Bunny Hop:
     It is possible to bunny hop your dirtbike. While not moving, hold
L1  (clutch)  +  X  (gas)  +  Analog-stick  Down.  Then, hold R2 or L2
(preload) until the bar is full. Then, release L1 (clutch) and if done
correctly,  you  should  take off into the air. Level yourself out and
complete  the  bunnyhop. It may be a little tricky at first, but it is
fun  to  jump  on  buses and and other things. You can also bunny hop,
going  slowly  (or  any  time  you can pull a wheelie). However, it is
easiest when going very slow or staying still.

Bail:
     Press R1 + R2 + L1 + L2 to bail

Hints:
     When  in  air,  hold  clutch for fast boosts. And unlock a secret
rider in the step up contest if you get 100,000 points in one run.