Today we explore deeper into DOOM's level's and their secrets. In this video I'm going to show you a Five Nights At Freddy's Easter Egg. It may be argued that this isn't FNAF Easter Egg but with the fact that FNAF is based around a party place and when you shoot the balloon it gives off the "Yaaaaaaay" Sound that plays when you clear a night in FNAF. DOOM Walkthrough Playlist:.