To make funny comic book captions appear when you attack a Rebel as a Wampa: up, down, left, down, left, right
To turn off HUD: Up, Up, Up, Up, Left, Up, Up, Down, Left, Down, Up, Up, Left, Right
As the republic, get a V-wing. Destroy the enemy's Targeting control bridge. Then fly in between the second pair of turrets right behind the control bridge, hit the ship. You should fly straight through the hull. On the inside, you can use your V-wing to take out the critical systems internally, which doesn't take near as long. Plus, you can have fun massacring Battle Droids.
This next glitch works best as the reps. Fly towards the airlock shield(right before you exit the hangar) and land. Get up. Land. Get up. Land. get up land. By now, your ship should be landed outside the hangar. You can get out, but note that gravity is always the standard "Down" in the hangar.
If you use the last glitch, you can keep getting up and landing as much as you want. It is possible to land on frigates! Use the republic starfighter(Jedi Interceptor/ETA-2) and stay on the little ledge right underneath the hangar. Once you get as close as possible to the acclamator(republic frigate), go off the ledge and keep landing and getting up in mid-air, or, mid-space, I should say. once you get far over the frigate, land. You might end up at the edge of the ship. If this happens, strain yourself to just make it on. You might be able to "land" in space, and get out on the frigate. If you steal a Republic fighter as the CIS, have fun battling turbolasers!