Thats pretty much the exact reason why i stick to rails that are 34 inches high and under. Nutting yourself has both physical and mental consequences. You just look like a complete fool when you do it.
Last season I was having an awesome park day, and had a head of confidence going. There was a high flat rail, that i was going to try for my first time. Well the lip wasn't as big as I thought and only kicked me high enough to boot level, and I basically dropped on the rail. I braced most of the fall with my hands, but I looked like a complete tool having to climb off the rail like I was dismounting a horse.
After that I learned side entry...