I've shot myself to the forehead once with a .22 straight on.
I shot a large block of aluminium or something at a dumpster. Turns out it was a bad idea. The bullet ricocheted straight back popping me between the eyes.
I couldn't understand what happened untill I saw the completely flattened bullet on the ground. I was lucky it hit between instead of to the eyes.
If someone wonders why we were shooting at the dumpster it's because it was an old factory dumpster filled with discarded appliances from the factory. Porceline toilet seats, sinks, lamps etc. They are fun to smash.