A few months ago, I had a dream that I was riding Thunderbird at Holiday World, but for some reason, it was themed to Superman. It also had a slightly different layout. I have no idea where I came up with Thunderbird + Superman theming.

Another one I had a while ago: I was riding Renegade at Valleyfair, and while I went up the first air hill, the train flew off the track up into the air, and it started flying around like a plane. That's pretty much all there is to it, but it was certainly strange.