I'm planning to leave an explosive device wired to Chris's engine. Comical, huh?
Not comical in the least. Are you trying to kill him?
I want to punish him for his behavior
Punish him? If you don't end up killing him, you're gonna ruin his vehicle. That isn't punishment, that's cruelty.
I think this is funny.
If you're making a joke, it isn't very funny. Sabotage is not a prank, especially the caliber you're referring to.