Theirs certain tricks you can't do because you are not on the right
level. I didn't know why I couldn't do the cool tricks but that's what
im going to tell you. when you do career mode you can see your
guys/girls stats go up each time you win a race. if you look in your
booklet it will show a list of tricks and if you read right above it you
can see that it says level 1 2 3 4 etc. when you look at your character
you'll see his what level he/she is at. and if you count the lines
that's what level he's/she's at.