Not sure if this is a blessing or a curse as they hire you as a stunt man and put you on a speeding car with no brakes. The pedal is stuck and all hell is about to break lose. You don't have an option for s safe ride. All you can do is to do some stunt and hope that you won't get hurt in the process.
The idea of the game is to do some stunts. The more distance you covered, the more money you make. Perform some stunts to activate your booster. You can use the money to buy upgrades or buy a better car.