The only real problem is as I was taking a swig of water during the second act, I swallowed the wrong way and REALLY could not stop coughing.  I thought I was going to choke to death...not literally of course, but it felt pretty damned close.  I was up in the tech deck, but since it was so dark, I couldn't see enough to even go down the five steps and go outside.  I tried to stifle my coughing as much as I could, but I'm sure that I disturbed the people in the back row, but it was dark and I couldn't see.