Puddle Trick:
When you can't go around a puddle than hit it strait on and pull back (using down arrow) or let off the gas (let off space-bar) and pull back.

Punching and Kicking:
Use these keys to punch and kick during races.

Punch left: M
Kick left: N
Punch right:,<
Kick right: .>

Tail Whip:
To whip the tail end of your bike around just get some big air on a jump and in mid-air tap the brake button 2 times.You shuold see your bike whip side-ways in the air.