Yesterday, I was on the pad scoring for one new shooter. He was shooting a Glock 17 in Linited using a Double Alpha race holster. After he finished the stage, and showed clear, he holstered. The RO missed that he didn't lock his holster, and I watched as his Glock tumbled out of the holster, doing a flip, and hit the ground with the muzzle pointed at the center of my chest. As the gun was tumbling, I was pondering "empty" and a Glock, and didn't dive out of the way. With my head in the pad, I could have been oblivious.
I really do like the idea of drop safe pistols, even in competition.