To explain Pirahpac's results, don't forget his awesome lines. I can perform all his barrel rolls and i can't get close to the damn guy in the rankings, arf !
For metropia reverse : http://www.youtube.com/watch?v=zVJKF...eature=channel
There's another technic for the boost/br, you can fly over the archs instead of below (Pirahpac's discovery, astonishing, no ? ).