Ok here is a sketch that is pretty easy to do in the game, with a little cutting and pasting and stuff:

[Jazz and Spaz are under fire by the enemy]
Jazz: What are we going to do about them?
Spaz: Uhm... hey look a cannon!
Jazz: Uh... shooy stuff at them?
Spaz: Oh shoot me! shoot me!
Jazz: Huh?
Spaz: Shoot me at the enemy with the cannon!
Jazz: You sure that is safe?
Spaz: Of course (not)!
Jazz: Well ok then.
[Spaz jumps into the cannon]
Spaz: Now light the fuse.
[Spaz shoots out of the cannon. Jazz then uses a flamethrower weapon to ignite the cannon. Spaz shoots out the cannon]
Jazz: how did he do that?
[small scene with hyperspace like background moving by real fast as Spaz does a kick attack]
[Spaz flying through a group of enemies killing them all]
Jazz: Wow it actually worked.
[Spaz kick flies through a wall behind Jazz]
Jazz: Where did you come from?
[Spaz shoots out of the cannon]
Jazz: Ok now this is getting too weird.
[another Spaz walks in from the other side and another from above]
Jazz: Were you all hiding in that cannon?!
All the Spaz: Hey look a cannon!

I don't think it really sounds funny here and a bit cliché but even something like that is easy to do without modification.