In our students flat, in the main hall (which is about 3 stories high), we've got a blow-up swordfish hanging from the ceiling. A student who lived here found it by the trash one time and hung it in his room, but he has moved away some time ago and donated the swordfish to us, the current residents. We decided to hang it by its tail to the ceiling. Problem is: my room is at the top of the flat, and every time I or my neighbours walk past it, we get the urge to drop the swordfish onto any unsuspecting lower-living neighbours. But dropping the thing yourself would be quite a mean thing to do... so I decided to create a little something so the drop would be initiated by the victims themselves.

Ingredients for doom & destruction: