when you're on your decent, the word will turn red, and if you click the screen the bike chick will come and give you a boost upwards again. You only get three of these. If you hit the ground and are on your way up again the word turns blue, if you click the bike chick hits you angled more down (hint do this when youhit a guy and get angled up for lots of height) You get this 1x per 100% you get, you accumulate %points as you fall and go up on the screen it looks like. Then the special moves are when you hit someone and it says "special click screen" ifyou c lick in ttime you get a big boost. You get a ENORMOUS boost if you get a stopper/special.. the chick that is supposed to stop you, if you click quick enough when it displays 'special' (not on all stoppers) you get a HUGE boost.
GL