Here Is A Practical Joke I Played On A Substitute Teacher In Junior High.

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Here is a practical joke I played on a substitute teacher in junior
high. Numerous variations on the theme are possibile (jury-rigged
showers in chem. labs, fire sprinklers, etc.)

The classroom (Earth Science class)had the normal lab sinks with spouts
shaped like inverted J's. Over the years (old school) some of the
J-shaped pieces of pipe had broken off. This was during the energy
crises years, and the schools shut the classroom's heat off after
school. In order to prevent the pipes from freezing, they were drained
nightly. The janitor would often forget to turn the water on until 4th
period, much to the consternation of us 1st period students when we had
to use the sinks.

I waited until a day when a substitute teacher showed a film. After
everyone else filed out of the room, I simply opened a faucet or two
that led to a broken sink. As luck would have it, the water was turned
on during 4th period *in the middle of the film*. To make matters
worse, the broken pipes had been used to dispose of used gum at various
times. All this old hard gum acted much like a finger on the end of a
garden hose. Naturally, the first thing the sub did when utter chaos
broke out in the middle of the film was to turn on the lights.
Unfortunately, one of the lights was right over one of the `geysers,'
and the lights stayed on for about two seconds before going off again.
It was several minutes before everyone figured out what had happened,
the faucet was turned off, and the janitor had turned the circuit
breaker to the room on again.

No matter how hard the sub tried, she could never get anyone to confess
to doing it. She even kept the class after school without success.

When a friend in 4th period told me what had happened, I almost died
laughing.

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