I love when this happens! I started one of these at a lil'jay concert some years ago (FYI...lil'jay was the Christian version of lil'wayne when he was a kid) and MAN did I get reprimanded from concert staff for causing a disturbance It was awesome though. Doing my thing, being hated on by the man, heck even lil'jay saw what I was doing from the stage and called it awesome.
I also started one at a Christian hardcore show and got thrown out. Aw man...I miss those days.