Nope. It's not "involuntary." It's a lack of personal control. There is no excuse. I can't believe the High Power competitions tolerate it or excuse it. Or diminish the serious breach of safety with light-hearted euphemisms. Seriously. WOW. There is nothing funny about it, either. Someone almost got killed in that video.
Perhaps (given my limited poor experience with High Power) I shouldn't be surprised.
It's absolutely controllable. Anyone who endangers others "involuntarily," should be involuntarily escorted off the premises and banned permanently. And if they weren't, while I was there, I would discontinue my participation due to unsafe management and unsafe officials.
I've been burned by hot brass many times.... on the pistol and rifle range. On every occasion, I was able to control the weapon, put it down, and then address the brass. Yes, it hurt. But I was able to consciously prioritize safety over pain relief.