Let ‘em off!
There is a universal rule of the subway to let people off the train prior to boarding. But, no one follows rules.
I was on a crowded train pulling into a crowded station. Once the doors opened, a group of people pushed in as a smaller group pushed out. One guy attempting to exit the train pointed to the ground on the platform and yelled, ” Is that someone’s wallet?” It was like the parting of the Red Sea – people scattered to look down and check the ground while the gentleman walked calmly through the crowd. Nice work.