Someone on Youtube had a lot of time on their hands. They took some of the scenes of the Beatles being chased onto a train in A Hard Day's Night, and mixed them together with scenes from the Korean horror film Train To Busan, and gave us what would be a trailer for something called A Hard Day's Nightmare.
The mashed-up editing is incredible. It really DOES look like the Fab Four are being terrorized. Or is it THEM scaring some of the people once they get on the train? Hmmmm.