lol, I can usually tell just from looking at mine if they have a pink belly and are about to go blue so I don't usually get surprised by that. What bothers me is when they all decide to shed at the same time. >_< Having 10 BPs and 2 Boas there is generally something I can take out enjoy, but my BPs love to shed at the same time.
I also don't wait 48hrs, I feed at night and then I'll start handling them again the next day.