Here are the rules for repetition:
- The same jump is only scored once. This means if you go over a jump in one direction and do a flat spin then go back and do a barrel roll in the same direction you will not be scored for the second time.
- Billboards and smashes can not be repeated.
- Repetition is per combo so you can go back and try again if you crash.
- Boost scoring degrades over time. It ends up on 1 point a second.
Please note that there are lots of jumps you can jump of both ways. This does not count as repetition.