Use the handbrake and gain speed to collect the checkpoints floating above the half-pipes. Hit the pool to grab all of the checkpoints inside, and bunny hop out to the half-pipe. Start out by grabbing the closest ones to build your timer up from the start. With each checkpoint collected, you will receive additional time on the meter. You must collect all of the checkpoints before the timer runs out. You will need to have your cycling skill fairly high to compete in this challenge. Go to Glen Park's skating park and hop on the BMX bike here. The area covered will be less, so it's a little easier to complete them and earn lots of cash in a hurry. Note: It's a good idea to do these kind of missions in small towns, like Angel Pine in the Countryside.