This video is exactly why I only carry DA and DA/SA pistols if I'm going to put a pistol anywhere in my waist or pockets.
While an accident like this can be easily avoided with any pistol, it just goes to show you that **** happens.
Glocks are great guns, but I would NEVER carry one pointed at my best friend all day. This guy is really lucky. He could have easily severed the femoral artery and bled out or even worse, he could have got an unplanned sex change
Edit
After watching this again, it looks staged to me. Maybe it's some type of training video???