JAKE: BMO, do you know where Finn's at?
BMO: I do not, Jake. He said he had "to go get something totally unrelated to Jake's present," and I haven't seen him since.
2 - Inset panel. Close-up on Jake and BMO. BMO looks naively unsure; Jake is suspicious.
3 - Outside shot of Finn and Jake's treehouse. Word balloon coming from within.
CAPTION: And so.
JAKE (within treehouse): Hey, Finn! Why aren't you at my totally sweet birthd--
4 - Interior. Finn is in the main room, surrounded by piles and piles of stuff. Feel free to include as many references to previous adventures as you'd like in that pile. The important thing is that Finn sits on the ground, hands around his knees, crying. Jake is just coming into the room and is shocked by seeing his friend so sad.
JAKE: Ohmyglob! What's up, broheim?
FINN: Everything's up, Jake!
5 - Closer in on Finn, with Jake having come closer so that he's also in the panel. Finn throws his arms wide in frustration as he explains what's up.
FINN (1): I wanted to get you the perfect encapsulation of the math importance I place on our friendship - you know, in gift-form - but I can't figure what that is!
FINN (2): I'm totes the worst best friend forever ever!
6 - Jake puts a reassuring hand on Finn's shoulder. Jake wears a serious expression. Finn is feeling a little better.
JAKE (1): No way, Finn!
JAKE (2): We both know that gifts are awesome --
FINN (interrupting): Way awesome.
JAKE (continuing): -- but what's way awesomer is spending time with your bestie.
7 - Finn and Jake hug, both with happy smiles on their faces.
JAKE: The only thing I want on my special day is to share it with my specialest friend.