n__n New one, should work with anyone's game.
A) Open mouth glitch. 1. Use an Argonian (currently testing this with other races, but Argonian is the only one that seems to work. I had a male btw. XP )
2. Go to your inventory.
3. Make sure your character is facing you, and that it's zoomed in as much as possible. (also, no enchantment lists are blocking the face.)
4. Exit inventory.
5. Hold down the attack button until the character just makes the verbal attack sound.
6. Quickly open inventory.
7. His/her mouth should be open. Try again if it doesn't work right away.
B)Eye glitch. 1. Follow steps 2, 3 and 4 of the above.
2. Run quickly past a person or horse, close enough so that your character turns their head.
3. Quickly open your inventory.
4. Their eyes should look very strange. (they are looking to the side, but their eye color is filling where the white should be...it's pretty neat.)
5. Repeat if needed.
Oblivion is the most amazing game ever made. Great job, Bethesda.