I have had my gun fall out of my holster accidently only time, back when I carried my S & W 642 in an IWB holster without a top strap. While sitting down at a restaurant I leaned over to pick up my napkin and it simply squeezed out the top and plopped right down on the carpet right at the waitress's feet. I had some serious splaining to do. My worst one was when I unholstered my duty weapon and set it on the top shelf in my locker while I went to work out. When I opened my locker again it fell out from about head height, spun around hitting the wood bench, did another sommersault and landed square on the backstrap on the hard tile floor pointing right at my partner who dove out of the way. Thank God for Glock 22 and their firing pin safety, whew !!!!, dodged a bullet that day.