what are some funny/cool things your teachers did while you were in school? what about fun projects you undertook? share w/ zelaron the nostalgia of the old days.

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my dad is a teacher for wood shop, and everyone was talking... so he attached a whistle to the air pump and let 'er rip! after a while no one but one kid would talk incessantly. so when my dad would take out the whistle, everyone but this one guy would clap their hands over their ears and my dad would walk right up behind the kid and blast him right next to his ears!