I thought this thread was going to be about the knock out slugs from metal electrical boxes.
We used to save them up in a cup in the work truck, then when we cruised by the old Denver rescue mission, we would grab a hand full and shout out to the bums "here's a little something for you" and toss them in their direction making sure that the slugs landed well short of the curb.
You should have seen them scramble into the street to pick up the slugs.......