First select single grand prix, then continue until you select a track, pick Indinapolis. Then start out in practice, pick flyinglap then go strait and stop before you hit the cones. Turn around then hit the pointy wall next to the pits (the one with the black advertisement on it). Your car should be fliping out of control (you will need to change your view to see it. WARNING: TO GET RID OF THE GLITCH YOU WILL NEED
TO TURN OFF YOUR GAMECUBE.