I've been to Grease: You're The One I Want, November 2006. it was seriously wicked and also hilarious, one of the set guys got a set stuck (showers) with two guys inside and the whole audience could see him hanging off the set tryna move it *chuckles* the T-Birds had to do some improvising haha.
i saw it as well bout 5 years ago i think, still wicked though