I wonder if there's compositing at work here? In Alexanderplatz there's a woman blinking in the foreground from 0:37 to 0:41 but her friend's hand moves a coupl

I wonder if there's compositing at work here? In Alexanderplatz there's a woman blinking in the foreground from 0:37 to 0:41 but her friend's hand moves a couple inches. Then at 0:57 there's a woman who starts blinking and doesn't finish before her eyes pass out of the frame at 1:08, but the kid running behind her almost makes a complete step. A blink takes 100-150ms. For the 100m dash, Usain Bolt takes 41 steps in 9.58s, so 231ms per step. Either that kid is really hauling ass or the blinks are people completely shutting their eyes at the disturbance of the train's arrival, which is plausible. I don't spot anybody blinking in the background, unfortunately. I guess the easiest way to get timing would be to measure the distance between the pillars. Odd appearance made for fun little puzzle to play with for a minute.