Several years ago my brother and I made an exploding arrow, at least attempted to, ended up as more of a missile. We took an arrow plugged it about 8 inches from the end, then filled it with black powder. Then we put a shotgun primer on the end with a BB on it, using hot glue to hold it all together and in place. To test it we shot it at a cement retaining wall at about 20 yards. Arrow flew true, hit the wall, detonation was as planned however the black powder rather than acting as an explosive functioned as a propellant (imagine that!) after detonation the arrow came back at the same angle it was initially launched. My brother shot the arrow and I was standing next to and slightly behind him. On it's return the arrow hit me, with the fletching end, square in the shoulder. Not much force, just left a red spot didn't even break skin but was sure an attention getter. We then scrapped that idea and moved on to other stupid dangerous devices.