There is a stair at work that I will not step on. Even when I was station here before over twelve years ago, I would avoid stepping on it. Since coming back two years ago I have acidentally stepped on it about five times. It's not because of any superstition or fear. It's just to be different (though I can kick myself when I do step on it). The step squeaks and growns very loudly and sounds like it is about to break. If three people are walking ahead of me, they all step on it. I am the only one with the silent step.