OK, so every time Link puts on a mask in Majora's Mask, he makes a kinda screaming sound. If you ever wondered why -- maybe he's just really excited! -- well, a Nintendo employee has an answer.
Chatting with fans on Miiverse, a Nintendo rep/developer posing as the Happy Mask Shop guy from Majora's Mask says (via @mnemosynekurai) "It's very simple! The boundless sorrow surrounding each mask comes rushing inside the wearer when they put it on, so the urge to scream is quite understandable, really."