The YouTube is filled with negligent discharge videos. One occurred almost two years ago, when a fellow shot himself with his Kimberly .45 ACP while practicing a fast draw with a new holster that required thumbing a lever to release the gun from the holster. He received a lot of ridicule and mockery from those who consider themselves perfect and incapable of making a mistake.
It didn't help that Tex Grebner is an idiot, with extremely poor gun-handling skills in the first place.
I note that he shot himself while using a SERPA holster, which requires using your index (trigger) finger to actuate the release, not the thumb. The holsters that require using the thumb (such as the various Safariland ALS holsters) are excellent, and do not in any way contribute to NDs. The SERPAs, on the other hand, have. (Those folks who are using SERPAs, you all catch that?)
That being said, the SERPA use isn't what caused him to shoot himself. After taking the gun from the holster, sticking his trigger finger on the trigger and applying pressure on the .45 like it was a Glock was what caused him to shoot himself.
He received a lot of ridicule and mockery because he is an idiot. Some of which, I'm sure, came from people who thought they were too good to ever ND. However, much of it came from the fact that he is an idiot.
Accidents happen to those who attempt skills that are beyond their training, and it happens to those who consider themselves too well trained to have an accident.
I'll completely agree with that.