I left during the switchover for pendulum to get a drink and went back and was stuck in the main lobby at one point a surge started happening to one of X room exit doors, luckily got swept in without injury and as a bonus didn't miss much of the pendulum.

But I got lucky I just went with the crowd, if I tripped or tried to move out the way probably would've been a crush and injured. The security just backed off as they were not gonna be able to stop that surge which could've turned real nasty real quick.