German authorities are cracking down on potato guns, homemade cannons made of pipes. Kids stuff potatos and other projectiles down the pipe, then use hairspray or lighter fluid as the propellant. When I was in college me and my roommates wanted to make a potato gun. We had the perfect location too; there was a large, empty field behind our apartment. We could\’ve just aimed the cannon out the patio door and fired away. We never got around to actually making it though.
[ From Slashdot ]