This freerunner comes to the end of her stunt where she hops on a running scooter, presumably to take off on it.
She didn't quite hit the seat right, the bike falls, but is still running. She and her friend go to lift the scooter, and it takes off with her holding onto it. The woman comes VERY close to getting injured by the bike, but it's all good.
Cautionary tale: turn the bike off... THEN lift!
Below is a different cut of the same shot, with more footage at the end so you can see that she walks away OK.