A group of people get trapped on a subway car. They get to their stop but the doors don’t open. Santana comes on the radio. They begin to collapse on top of each other forming a writhing mass of sweaty bodies. Some may call it an orgy. Others may call it their train ride to hell for group sex is a sin.
It was later discovered that nobody even tried to open the doors and they weren’t actually stuck, they just got confused and had an orgy.
The end.
Oh, also that train car was a mess. They had to throw it out.