Grinding
Go up to Space Mountain. Press [Left Ctrl] to get on your skateboard. Then, while on the skateboard ride off the side of the mountain at the space port (not the rocket ship, but where the building is located). Do not turn until you are on a brown piece of land. Once there, turn left and go upwards to the side of the railroad tracks. If you are in the corrected position, you will grind the tracks. Note: Several attempts may be needed.