As soon as the race starts ignore all over cyclists just head straight for the wooden ramp at the end of the mountain top when you get there try and pull the insaniest stunt possible. You can push the car to the nearest garage and the doors will become unlocked. This glitch allows you to upgrade you cycling skill faster.Just as your about to hit the floor you will respawn where you origanally started and still claim the stunt bonus award. To exploit this glitch you first need to find a bike (no brainer), then you need to find a freight train and wait for it to stop.Note: CJ and the bike may become invisible while on the train.
The bike should now be floating slightly above the train but will remain in place.
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If you go pick up Barbara for a date, she might say that you aren't fat enough to take her out.
You will notice that the wheels of the bike are moving at the some speed as the train even if you let go of the X button.
This allows you to get cycling skills faster than with normal bike riding.