He may have moved the scope when he fell down. Sarah’s first shot out of the other rifle downed the big Buck.
More than likely, they hit it on something while loading the plane. It should have been checked at the first stop before flying into the hunting area. Not only does it make the future president look like a bad shot, (which I’m sure she is not), but it would be very dangerous in the event of a bear or wolf attack.
Almost a certainty.
Most scope mounts aren’t able to take a real knocking about without losing the zero. Many scopes aren’t able to keep zero themselves, (never mind the mounts) if subjected to a shock.
Mounts and scopes that maintain their zero despite being dropped cost more than most rack-grade sporting rifles. Figure north of $1K for the glass, a few hundred for the mounts for a truly tough setup.