According to the BBC teacher Annalisa Flanagan is behind the world’s loudest thing ever shouted. Imagine a classroom being shaken by a sound louder than a rock concert. Or a sound as loud as a thunderclap or a chainsaw. The Belfast primary school teacher bellowed her way into the world record books in 1994 with a thunderous bellow of the word “QUIET!”. The shout clocked up an earth-shattering 121.7 decibels. It set a world record and potentially damaged the hearing of anyone within earshot.

(via: Fangoddesses)