Dr. Muto Easter Egg - Flush 'N' Fart

1.Go to the lab.
2.Go down the stairs and to the living room.
3.There are some stairs next to a wall with photos. Climb the stairs to Muto's bedroom.
4.Next to the bed,there is a toilet.
5.Hold-zap(not blast)the toilet.If you hear CLOSELY,you'll hear the toilet flushing itself.
6.If you continue zapping,you'll hear a fart.