*Sirius is cooking*
James: Any chance that's for me?
Sirius: It's for Remus. I'm planning on making some bad choices tonight, and I need them on my side.
Peter: I never realized the forethought that went into being a disappointment.
FIRE
Remus: Dammit, James!
James: What?! It wasn't me!
Remus: Sorry, force of habit. Dammit, Padfoot!
Sirius: Not me either.
Remus: Oh...Then who set the house on fire?
Peter: *whistles*