Make a chocolate cake with a giant turd in the middle of it, and then poison the icing.BEST PRANK LOL
put a flaming bucket of gasoline over a door, so when someone walks through it the burning gas falls on them.
1. It would burn out, so you'd have a very short time period to get them to walk though.2. Gas wouldn't burn well in a bucket anyway, the fumes are what burn.
Of course this whole topic is serious!