No, I think it is worse when the actor/ess waits until 35 minutes before beginners to call in sick because 'there is the understudy', and then you get another major part ring in who also has the same understudy, and you are screwed because now it is 15 mins till curtain, one understudy confused about which role s/he is meant to play and NO way to solve the problem. I just thank god that I did not have to call that show cos my ops knew it so well...