Yes all three cats have come running around the corner so fast that they have practically knocked me over. One night I woke up in the middle of the night and I had to go to the bathroom. I was going to the bathroom and Sunny came running out of the bathroom and really scared me. He's done this twice so far. He was sleeping next to the toilet for some odd reason. Storm scared my former rommate once. She was going into the kitchen and he was on top of the refrigerator and I guess she was opening up the refrigerator so he scared her.