the only time I've almost fallen asleep at a musical was Shuffle Along. I was thoroughly enjoying the evening but there was a lull in act two with a LOT of dialogue I was having trouble focusing.
i think I fell asleep at a Michigan Opera Theater production a few years ago (I believe it was la rondine or Madama Butterfly in 2008 or so) but only for a few minutes
when I was a teenager I would routinely fall asleep in movie theaters for several minutes, but I attributed that to my poor sleep schedule (staying up too late therefore getting only 4-5 hours of sleep before school) and not on the quality of the film.
"Contentment, it seems, simply happens. It appears accompanied by no bravos and no tears."
My Nana fell asleep at the Tony Awards in 2009. I felt it was important to wake her up because she was sitting in an orchestra seat on the isle... And her cataglory was coming up