Extend a Freestyle event past the third lap.

This achievement is very tough. It requires you to at least start a fourth lap in a Freestyle event. To get that far you'll need to grab as many Fuel Freezing power ups as you can as well as performing as many Fresh and Special tricks in combos as possible.

Also, you can't crash at all because crashes reduce your fuel considerably. One crash and you most likely won't get to finish the lap you are on.

This achievement will require both luck and skill to pull off. It may take a couple of tries.