One of the MagPul guys, who is very trained, and has good enough discipline IMO, had an ND while trying to draw in a defensive pistol demonstration. This guy has had more training than me on the SERPA, and is specifically trained on the SERPA. If it can happen to him, it can happen to anybody. Like I said, I had a SERPA until today when I took it back. I don't feel like being "that guy" on the range, lol.