This cop violated a rule that I know very well, never ever take your finger off the siderail of the gun unless you intend to kill the person the gun is pointed at.

In training this will get you expelled and blacklisted, they used to not give people a second chance. Nowadays you can get 2 chances.

this video is old, but I couldnt find it in the sift.

BTW: No one is hurt, that I can see in this video.