OK, it looks like he was a bit of an ass. Those choppers aren’t silent and he didn’t need to do that on the way back (there was no patient in tow at that point).
I was hunting elk once when a chopper spotted them and flipped a bitch, scaring the herd. Immediately thought it was my brother’s fault. Sure as hell, he was taking a tourist flight in the local annual hoop-de-doo and spotted the herd.
It sounds like he was being rude and obnoxious. Perhaps someone with an agenda against hunting?