Your head needs to be on a swivel at all times and that includes looking north and south. Escalators in China are scary to begin with, I've seen numerous videos of these demon stairs sucking people up. So riding one has most people cautious to begin with. Then life hits you with a plot twist and decides to dump the roof on you (literally). Somehow nobody was seriously hurt.
Especially my man with that man purse in the grey shirt, look at him just freeze up and splat! I'm thinking the escalator rails helped people from getting seriously hurt.