About a month ago me and a few friends were spending some quality time at an indoor range when something potentialy deadly happened. I was standing behind a friend while he put a few rounds through my EAA Witness P .45 (junk, sold it). Apparently an ejected case hit the wall on the right, went up hit the target runner then came down and hit the primer of a live round. Yup, it went bang. It blew the box and ammo all over the place. My friends face was about six inches from the detonation and very fortunatly was not injured. I was hit in the chest with a live round or two but also was uninjured. Before this happened I don't know if I would have belived an ejected shell could have enough energy to do this, but they do. Now all of us make sure all ammo boxes are closed with no exposed primers while we are activly shooting. Has this ever happened to anyone else? Does anyone have any other "extra" safety suggestions to pass along?