I was telling my wife how I have a fear of drainage inlets on the streets. I am always afraid I will drop something down the drain and I won't be able to get it back. Also have the same issue with elevators, you know the gap between the elevator and the floor you are on. I am always afraid I will drop something down there. Turns out my wife has a fear of escalators. Not all of it, just the part at the end. She is always afraid something she is wearing will get stuck there and she will get pulled down.