Have you ever seen anything that no one believes you saw?
I saw something I don't believe I saw. I was walking to school, and I saw a man in a black jacket 20 yards up the road. I looked away for a second, and in that second he went from 20 yards away to walking past me. I either thought it was a second and it wasn't, or he's the Fash. Either way, I don't know what it was I experienced, and I will most likely never know, but it freaked me the hell out.
I've experienced similar that I accept I'll never be able to explain.