One of the videos you can hear “shooter down” before he gets up. Elderly, near death experience, and monumental arrogance would help explain his reaction pretty well!
Shooting him isn’t the way - but I can see why someone was scared enough to think it was. Just remember kids, voting for Biden isn’t just voting against trumpler - it’s saying you would literally prefer someone who is probably senile overhim. It’s a solid insult, and you should go out there on polling day to make sure he hears it.