Odd Occurrence

This situation made the list despite how ordinary it seems because it keeps viewers in suspense. Nothing unusual was going on and captured either. The two people are just operating the controls on their respective floors. The man waited for the girl to pick the floor she needed to go to.

Even though they are standing near each other, it seems they are friends. It also looks like they have been pressing buttons on many levels. As soon as the guy left, the lady immediately followed after him. Is this a normal situation? Why she resurfaced in the elevator only a few minutes later remains a mystery.