If you stay just a little (about one pixel) above the place where the grass meets the dirt there won't be anything in your way. You can crash the game by hitting the bale of hay on the bottom of the track just before the finish line. The game will freeze and the only thing you can do it turn it off.
In the surfing game, you can ride the pelican. Run your last man into the bottom of the screen a few seconds before the timer runs out. The bird will fly across the screen until the timer runs out and you'll land on it! It's possible to do an UNREAL 360 (5 360's) for 1200 points.