I dunno, I think it's possible to self-induce a fit like that if you get into the correct mental state. But you do have to work yourself up to ecstasy--you can't just go from zero to eighty instantly. And she did it in a VERY inappropriate place.

I think one of the creepiest things I ever saw was in the movie Jesus Camp when a bunch of 8-12-year-olds had a mass religious fit. Watching a little girl sob and moan and and speak in tongues = really, REALLY disturbing. Fanatics are messed up.