The ride up gives you time to become accustomed to the experience, then you get to come down in a clearer frame of mind. Everone who rode it came up laughing after they hit the water. It was more fun than any roller coaster I've ever ridden. When I built mine, the only information I had came from the encyclopedias in the school library. My design was based on a few sketches I saw and my own mechanical intuition.
Today there is a lot more information.
I've seen lots of it over the years, but haven't kept track of any of it. You're on your own here. I don't want anyone to get hurt. Several professors of physics and mechanical engineering warned me not to do it, and my machine shattered while I was riding it. I was lucky I didn't get hurt.