Freddy Pharkas, Frontier Pharmacist Easter Egg - Funny Noises

This Egg can be done in any act, anywhere, just as long as no sounds are going on and no one is talking.

1. Be sure NumLock is on.
2. By using the Keypad keys you can play goofy noises found in the game.
A lot of them are from puzzles in the game, like I'm sure about these:

0 & 9-Fart noises (Horse Puzzle-Act II)
1-Yeehaw (Start Up)
2 & 3-Cowhand revolts (Cowhand puzzle-Act IV)