Got a great one. Took a metal shop class in 8th grade. Teacher was this old, grisled guy who probably never graduated but knew everything there was to know about metal work and welding and etc. Good guy.
Well, one day there were several of us inbetween projects, because you can only submit SO many welds for grading, and started innocently playing with the air nozzle.
First it was a pen cap, the blue kind from the Bic pens, and we were shooting them across the table. Then we put the cap ON the nozzle and were shooting it into the air.
Then some future weapons guy (
) got the idea to pull the ink part with the clear plastic straw out and insert that end INTO the nozzle, up to the hilt with the pen end capping off the nozzle. Hit the button and the damn thing took off like a missile and hit the roof like a blow-dart.
Well, that went on for about 10 minutes until the teacher noticed what we were doing and came UNGLUED! Came over and dressed us down about all the shop hazards that could happen with an air hose and projectiles. Went on at level 14 pissed for about 8 minutes and finished with this story.
One wise acre was messing around with his buddy and walked up behind him and hit him in the butt with the air nozzle. Apparently the air nozzle hit him JUST right and injected air, backwards, into his lower GI and blew it up like an inner tube, perforated it and the kid ended up dying.
Needless to say, we didn't play with the air hose any more that year....