[SpongeBob and Patrick are running through Jellyfish Fields laughing and trying to capture jellyfish.]

Patrick: [pokes SpongeBob] You're it! [both laugh]

SpongeBob: [pokes Patrick] You're it! [both laugh. Patrick runs off] Wait, Pat, you're it! [notices a sign a few yards away and yelps. Patrick laughs, not paying attention] The sign!

Patrick: Huh? [tries to read it as he is running] Duuhh... aaann... ger... [crashes through the sign and falls off the cliff] cliff!

SpongeBob: Patrick! [runs down the cliff to Patrick] Let me help you out of there, buddy! [grabs a starfish shaped head out of the ground. When he notices it's just a head, he screams] Is the rest of you down there?

Patrick: [walks up to SpongeBob with no head attached to his body] The rest of me is up here.

SpongeBob: Whew, you had me worried there, buddy. [laughs] Here's your head. [attaches the head onto Patrick and laughs. Picture of inside Patrick's head shows a plug plugging into an outlet. Gears and cranks start up. Patrick gets a spark or two from his head]

Patrick: I find all this laughter to be highly illogical.

SpongeBob: Well, let's stop laughin' and let's start fishin'! [takes out two jellyfish nets. Hands a net to Patrick] Go ahead, you get first crack.

Patrick: [jellyfish floats by] Look at them. These graceful stoic creatures of the deep.

SpongeBob: Huh? Those are some big words, Pat. I've never heard you use them before.

Patrick: Nonsense, my vocabulary is infinitely expanding.

SpongeBob: Well, let's expand our jellyfish nets! C'mon, Patrick! [captures a jellyfish] Look, buddy, I captured one!

Patrick: Yes... [shows SpongeBob a notebook with a Leonardo Da Vinci-style jellyfish drawn] I captured one as well without disturbing its delicate ecosystem. It is wrong to harness nature in such a barbaric manner. [frees the jellyfish from SpongeBob's net]

SpongeBob: Okay...what do you wanna do?

Patrick: Let us go off and admire the beauty and fragility of nature.

SpongeBob: Pretty.

Patrick: Yes, quite.

SpongeBob: Fragile.

Patrick: Indeed.

SpongeBob: [jumps at Patrick three times] C'mon, Patrick, let's do something fun!

Patrick: Oh, you want to run some statistics or observe phenomenon and render hypothesis of said phenomenon?

SpongeBob: I was thinking more like jumping rope, [jumps rope with his arms] 1-legged races [one leg goes inside his body and he hops on his remaining leg], or playing duck-duck-hermit crab. [jumps into a hermit-crab shell and blows bubbles]

Patrick: Doesn't feel like fun.

SpongeBob: [pops out of the shell] How about some jokes? [Patrick sighs] Patrick, what's the difference between a guitar and a jellyfish?

Patrick: You can't strum a jellyfish.

SpongeBob: Yes! [laughs. Patrick grabs a jellyfish and strums its tentacles]

Patrick: Oh my, look at the time. I really must be going. [walks off]

SpongeBob: What's wrong with Patrick? I sure hope he gets better soon. [at Patrick's house where Patrick is doing some scientific work] Are you better, Pat? Uhh, whatcha doing?

Patrick: Just studying this amazing subspecies.

Plankton: [through a microscope] I'll show you subspecies!

SpongeBob: Wanna visit Squidward?

Patrick: Well, since I am finished with my work, I'll humor you with your trivial pursuits. [now at Squidward's house where Squidward is playing his clarinet. He hears SpongeBob and Patrick come in and prepares to yell at them] I'd recognize that piece anywhere! Cornelius Pufferfish's Opus 67, "Symphony in Blue."

Squidward: [very confused] Patrick?

Patrick: It's a beautiful piece. Execution needs some work. [walks over to the piano] May I suggest on the 7th bar of the adagio andante that you add a little fortissimo on the arpeggiated b-flat scale.

Squidward: Wow! I never thought to do it like that.

Patrick: Well, that is because you rarely think.

SpongeBob: How do you know so much about music?

Patrick: A creative outlet provides a spiritual release and helps facilitate a healthy mental balance. [inhales] Ah.

SpongeBob: Does that include... [burps] belch-talk-ing?

Patrick: [waving his hand in front of his face] Mr. SquarePants, I find your humor vulgar.

Squidward: I had no idea you were so knowledgeable, Patrick! Do you think you can be my musical mentor?

SpongeBob: Uhh, guys? [notices Patrick teaching Squidward]

Patrick: Let's take it from the top. [Squidward plays, badly] Not so excellent, Squidward. Let me demonstrate the proper technique. [looks at clarinet with spit covered all over the mouth piece] On second thought, practice makes perfect. Let's begin. [SpongeBob comes up playing his musical nose as a flute] Thank you, my good chap. Unfortunately, this is a solo piece for clarinet only. And 1, 2, 3, 4... [Squidward plays more. SpongeBob frowns and walks out. Patrick covers his ears since Squidward's playing is still terrible] Stop! Enough! [walks out] Find yourself a new mentor!

SpongeBob: Now that you have some free-time, let's get some grub.

Patrick: No, SpongeBob, I'm afraid not.

SpongeBob: Well, I have a brand new bottle of super-bubbly bubble soap! [blows a bubble that pops on Patrick's face]

Patrick: [wiping his face] No, thanks again.

SpongeBob: Well, maybe later we can play pirates.

Patrick: Robert, my dear, it's no use. We've just grown apart.

SpongeBob: What? What do you mean?

Patrick: I know we've had fun in the past, but we're just not compatible anymore. It's time we went our separate ways...such is life.

SpongeBob: [starting to cry] But Patrick, you're my best friend!

Patrick: I know it's hard, but brace up, chap.

SpongeBob: Yeah.

Patrick: Maybe our paths will cross again someday. Think fondly of me, Mr. SquarePants.

SpongeBob: Goodbye... Mr... Best friend! [sobs. At Sandy's treedome, SpongeBob rings her doorbell] Sandy, you there? I need some professional help. [Sandy and Patrick are heard laughing inside] Patrick?

Sandy: Well, Pat, the new you gets an A+.

Patrick: Why, thank you, Sandra. I find your intellect rather stimulating as well.

Sandy: Oh, really? Well, thanks. [SpongeBob cries then walks away from the treedome, at a chalkboard, there's an equation on it] Well, Patrick, what do you think about this problem?

Patrick: [changes formula] You simply change the literal term to a coefficient and the minuend will achieve the desired quotient. Even the simplest of mammals can figure it out with a little thought.

Sandy: [angrily puts her hands on her hips] What do you mean by that, Patrick?

Patrick: I'm merely suggesting you lack the ability to solve remedial equations.

Sandy: Are you suggesting I'm dumb?

Patrick: I'd use a more sophisticated word like 'impaired'.

Sandy: I think you'd better leave.

Patrick: I was only trying to help. [walks off]

Sandy: I don't need your kind of help, Mr. know-it-all! I liked you better when you were a barnacle head!

SpongeBob: [sitting on his chair at home, crying] I never thought I'd lose my best friend. How can I compete with geniusness? Ohhhhhh!

Patrick: [sitting on his chair at home] Surrounded by knowledge and no one to share it with. No one I can call friend. Who's that old chap I used to run with? [notices a book on the table next to him called 'MY FRIEND SPONGEBOB'] SpongeBob.

SpongeBob: [looks at his 'MY FRIEND PATRICK' book] Well, at least Patrick's my friend in my memories. [SpongeBob looks at several pictures of him and Patrick together, as SpongeBob begins to cry another picture is shown, it's revealed that Patrick is the one who put a tear on the last picture]

Patrick: Aww, the glory days. Why have we grown apart? I must apply all that I know to solve this problem! [looks at x-rays of him and SpongeBob's head, meditates on top of his rock, studies Squidward, reads a book. He puts the book down and shows his bloodshot eyes] What could it be? [applies a chemical on his head and grows hair] What's different? Ah! [tears out his hair] What?! I'd do anything to have my old buddy back by my side again!

SpongeBob: [doorbell rings] Coming... [opens door and gets kidnapped in a jellyfish net. Patrick is shown carrying the net over his shoulder with SpongeBob inside. SpongeBob pops out happily] Patrick, you're kidnapping me?

Patrick: Yes, I am.

SpongeBob: Yay! [jumps out of the net and writes "Yippie" in the air with bubble soap] What should we do?

Patrick: We are going to have fun, whatever the cost may be.

SpongeBob: Let's do this.

Patrick: Yes, let's have some fun.

SpongeBob: [jumping around] Oh, yeah!

Patrick: [jumping around] Oh, absolutely! [now riding on a shell down a mountain] Are you quite sure I found this activity to be fun?

SpongeBob: Yeah! [screams with enjoyment. Shell lunges them into the sand] That was fun, huh Patrick?

Patrick: [Swallows a mouth-full of sand] When did the fun go away, SpongeBob?

SpongeBob: It went away when you jumped off that cliff and knocked your head clean off.

Patrick: That's it! [runs off]

SpongeBob: That's what? Patrick, what are you doing?

Patrick: I'm going to duplicate my actions from that day to ascertain the origin of my cha...an...nge! [falls off the cliff]

SpongeBob: Patrick! Hold on, buddy! [takes Patrick out of the ground] There ya go. [notices he has no head and screams] Don't worry, Patrick. I found your head last time, I'll find it again! [searches around some coral] Not back there. [checks under a rock] Not under here. What if I can't find it? Oh, poor headless Patrick! [turns around and runs into Patrick making his head pop out] Patrick, your head is back! But, uhh, do you feel different?

Patrick: Quite unchanged, actually.

SpongeBob: I guess we'll never have fun together again.

Patrick: You said you found my dislodged cranial cap last time.

SpongeBob: Yes.

Patrick: Where exactly did you find it?

SpongeBob: Uhh, it was right here.

Patrick: Hmmm, impossible! If I landed here, the trajectory of my dismembered skull would cause it to come to rest, not there, but here, exactly five meters due north.

SpongeBob: But if that's your head, then what did I pick up over... [sign says 'Brain Coral Field'] Brain Coral! No wonder you got so smart, buddy. [blows off the Poison Sea Urchins off Patrick's head] Here you go, Patrick, your old head. Are you sure you want to give up being smart and "phosisticated" to be my friend again?

Patrick: Knowledge can never replace friendship. I prefer to be an idiot!

SpongeBob: Not just an idiot, Patrick. You're also my pal. [Patrick takes off his coral head and SpongeBob puts his old one back on] Patrick? Say something, Patrick.

Patrick: [burps] Hi, SpongeBob.

SpongeBob: Patrick, you're back!

Patrick: Patrick, you're back. [both laugh, then pull out their jellyfish nets, make oo-loo-loo sounds, and run off into the sunset]