This certain glitch in Harbor Speedway is very difficult to trigger. To perform this glitch you have to complete all three challenges on Harbor Speedway, but not exit the level. Start a Time trial and here comes the tricky part. You must edge your way over the center mountain. This is very difficult, and is recommended that you find the lowest ridge. A trick is to fall down and before you hit the ground fly back up, hover then charge forward, it may take 15-20 tries with this method. This glitch only works the first time you enter the level, if you exit and re-enter the glitch will not happen.