"Hold On Tight" is one of the San Francisco Blitz races. You have to drive on the other side of the highway, but try to avoid the traffic until you make a left turn to the bus parking garage. Then, you can either go down on the exit ramp (which takes you to street level) or take a shortcut by breaking through a window and landing on the grass. Then, make it to the last checkpoint before time runs out. The time is 50 seconds on amateur, and 40 seconds on professional.