This probably isn't a huge hairy deal, and I'm sure it's happened before, but last night, I just happened to watch Face/Off valley between the second lift hill and the loop. I was standing at one of my carts, and was facing it. It went up the loop, the front got about to the middle point, and then it went back down the way it came. It was kind of funny. It came back one time, went a little up the loop, and then left again. I never saw it again. I assume there are brakes there to catch it if that happens. I've always wanted to see that happen, just once.