All you need to do is work in a Maximum Security prison. The shit found there will curl your hair. I have seen a home made flail, home made mace (both complete with human feces on the points-so if it dont kill you, it will infect you) , home made nun-chucks, shanks/shives, razorblades melted into toothbrush handles, serrated edged weapons & a zillion more different things, even a machete made out of a lawnmower blade (so sharp it would shave hair). Some of the worst are a sharpened angled piece of chair brace tube. Once stuck, it makes a large hole & acts as a tube for the blood to pour out VERY quickly. Even pens, pencils ect, stuck in & broke off---very nasty. The eriest thing is sitting on a block on midnights, listening to someone sharpening thier weapon on the concrete, knowing it could be for you, but not being able to pinpoint the location because of the echo of the all concrete cellblock, then looking at your watch & knowing it is time to make your rounds. As soon as you move, the sound stops. Yes sir, been there done that ! I got a few years left before retirement & can't wait.