Well, apparently when these guys are in a bad mood they bicker. :/
By a bad mood, do you mean mad, sad, or what? When I'm mad I start hammering songs on my piano. Currently, playing While My Guitar Gently Weeps by the Beatles soothes me. I'm assumming you don't have a piano, so if I'm not hammering songs on my piano I just play some video-game that involves violence. When I'm sad.. I duno what I do. I just mope around and stuff. Sometimes I take a nap.
The coconut offers twice the fun, cause initially you swat it and then it becomes a jigsaw puzzle and there is nothing more interesting and amusing than a good and challenging puzzle.
I generally cant break stuff since then Ill get in trouble and my mood will just get worse. If I were to punch something, that something would have to be my brother, and I dont want to send him to the hospital. Ill get in trouble for that too.
Banning people for misspelled words sounds fun tho =P
Sudoku calms me down usually. especially if I do it while listening to songs with a good, solid, beat.