Bolt Bomb
by UnkleArky

First get two bolts(the bigger the better) of the same size and a 
nut(again, the bigger the better) to fit on these two. Screw the nut on 
one bolt up about one thread. Then fill the nut almost to the top with 
match heads. Then put the other bolt on the other side of the nut. BE 
CAREFUL!!! You want it tight, but not so tight that it blows in your hand. 
Then whip em at people. I found that throwing in bathrooms or over stalls 
workx great.