Its alot trickier than it looks, you have to make your turns minimalist, and start your turn as you are level with the flag your trying to avoid. the faster you go , the earlier your turn must start. If you slide at the back its all over.
heres one where miranda made it.

shes getting good, just wouldnt give up till she'd done it
If it goes really wrong, the camera person gets run down

The camera was just the movie setting on a panasonic still camera. format is a .MOV type. you tbe simply accepted it. its not a good format as I cant find any freeware to edit or make longer movies with the format. also very slow to upload