Crowd Caugh Phenomenon

When all persons attending a show wait until the "quiet point" ,right when the show begins, and all suddennly get an "itch" in the back of their throat and must all start Caughing unanimously. sometimes funny but always very annoying and usually occurs at any high school performance when the lights go down

"Dude I was at the band concert waiting for it to start, and when it did it was a total case of Crowd Caugh Phenomenon"