Only once, in Reno. I was 15 and lied to get in, because you had to be 17, back when the ratings were brand new. The original Exorcist was rated properly in my case .. the first time her head turned around, I was gone before it returned to it's center . .. WTF WAS THAT SHIT?!?!??

My stepmom had the novel at home, and when I read what I 'missed' I really didn't regret my rapid departure.
I've just realized that the staff/ticketperson must have gotten off on that, 'here she comes, and there she goes . . ! And that's how ratings really work
:>