I've had to sit at the back of Colossus for the last 5/6 years... It's never been half as rough as some people like to make out, for me anyway. I used to get leg cramps during the inline twists, but not anymore. I've had rougher rides in the UK (Infusion, Rita, my first ride on Nemesis was rather bumpy - but amazing second/third time around, Turbo on Brighton pier is like death)