Replying to Need help with rails!

I've been skiing for a few years and just got into skiing park last year. I think it's super fun but I cant seem to figure out how the rails work. I've seen some videos of people standing on them but that doesn't seem possible. I'm thinking that instead I'm gonna use my butt and/or my stomach to slide on the rail so I can balance better. I've tried it a few times and it went ok but I never had enough speed to make it to the end of the rail. I've tried hitting them with more speed too but then it really hurts my butt, and I've also tried sliding it with the rail between my legs but my balls got caught under me and I threw up. Do u guys have any suggestions?