This reminds me of when I got on that conveyor to go up a mountain with my skiis when I was 10, I tripped and fell over and over for a GOOD 2 MINUTES with some stranger trying to keep me up the entire time rip
Two people fighting on an escalator while the steps go up or down would be a great scene in an action movie.
An even better scene in an action movie would be two people fighting on a raft or other watercraft as it goes over rapids.
But the best scene in an action movie would be two people fighting on a roller coaster car as it goes around the track. (Just as long as the car doesn't turn upside down.)