I lived in a college dorm once that, in order to have good water pressure on
the third floor, had about 100 psi in the basement. Someone discovered that
he could tie a knot in the end of a length of rubber surgical tubing, force
it over the water fountain nozzle and blow the tubing up to about a 4 inch
diameter cylinder of water under high pressure. Next, one would take it to
someone's room and throw the water-bomb in bed with someone . . Not only did
it half drown the victim, It flailed around and beat him up in the process.
He was a physics major.
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