I laughed but it sure looked like the woman had some pretty dangerous gun handling habits. Her finger was on the trigger and it looked like she tried to pull it but it didn't fired because it was cocked with the safety on.
I'll admit to having laughed as well, but also think this was a very dangerous stunt and he is lucky there wasn't a ND involved. Especially since they are apparently in an urban area where the potential for collateral damge is immense. Couple that with her poor handling of the weapon and they were fortunate this is only generating laughs and not lawsuits.