Those are rotating jet turbines. To my limited knowledge there’s no way to just stop them. They wind down even if they had turned them off. The very first article I found searching his name showed him approach a jet that was slowly moving across the tarmac, which obviously means the turbines were turning and not going to just immediately lock up if turned off.
I don’t even know that the pilots would’ve seen him from the footage I saw in the one article I looked at.
Classic case of know your audience. I don’t think this is going to be a particularly unpopular opinion here. I know my personal anecdote doesn’t mean everyone else agrees with me, but myself and most people I know with social media have dramatically backed off. I think if it weren’t for fb shoving strangers and paid content in my face, my feed would be dead. As it stands I only even log in for my bootleg weather guy’s posts.