I've had it happen to myself and a family member. If the cat was frightened, there was no obvious reason why. We didn't live there, but it wasn't the first time

I've had it happen to myself and a family member. If the cat was frightened, there was no obvious reason why. We didn't live there, but it wasn't the first time we visited the house. We didn't harm her, but had to close her in a room.