Wow, the river looked like it was up pretty high in front of the Arch. I remember walking down there as a kid and seeing a good 10 car-widths parked down there, but the river was just about to eat your car. It was really neat to see someone else's trip to the Arch. It really is a wonder of modern construction, I'm glad you liked it!
I'll second you about the Ninja. I rode it last about 4 years ago, and YOUCH!!! I remember thinking it was great when I was 9 years old, and so was the Screamin' Eagle, and the Mine Train. In fact, I thought the whole park was the greatest thing until I moved up here (I know, CP fanboy and stuff). The last time I was at SDC, they had none of the thrill rides (I was probably five), so I'll have to get back there again sometime. Great TR!!!