*chucks water balloons*

*places potassium permanganate crystals in water supply*
( Nimble Colin camera-wrangling, globe-trotting whisky enthusiast, Fri 8 Jul 2005, 10:49, archived)

*places small incendiary device made from shotgun cartridges in a locker*
(it happened in my school once)
( Gnoll, Fri 8 Jul 2005, 10:51, archived)