What about exploding targets? Anyone ever use Tannerite? You can go HERE and watch some video of people using them. And HERE is another nice little video. Looks like fun, but I think I would have put my PASGT helmet and flak jacket on with that last. LOL.
I have used this stuff and it is great! You just have to be sure to be careful with it. Never place it on the ground where there is a lot of loose rock or gravel - it tends to launch the stuff at you. And never place a half pound charge (or more) closer than 50 yards to you. Lets just say you should take my word on this, as my trail and errors really should not be repeated.