Curious what made him get in 10 days ago?
Complete idiot luck. He is semi-retired (he retired but was bored so went back to agronomic sales) and retail invests on the side. He has a tendency to invest in outdated technologies. Like he's has a ton of Ford stock because he's sure American automotive is "coming back around." He bought in AMC because it was cratered because of the pandemic and (1) "no one wants to watch a new release on a TV at home" [side note: he personally has not stepped foot in a theatre in 15 years] and (2) "movie theatres will always exist because people need places to go on dates." He basically just effs around with like $150k of his retirement savings to have something to do.
He just got lucky. As I said, I had to explain to him why the stock was targeted for this kind of activity.