Best glitch? Simpsons Hit and Run. Go to Homer's first or second level, or Marge's level, go to the option screen and enter the horn=jump cheat. Get a relatively fast car, and go to the jump at the flaming tire pit. Right before you go off the jump, honk the horn. You'll go flying, and if you go far enough, you'll hit a wall above all the houses on Homer's street (I think it's his street). Also, if you do the same thing driving off the little stair ramp in the Stonecutter's place, you go up, up, and up. And if you can do the first thing but land in the water, you go underwater and can drive there.