Same kind of deal, opposition needs a big shot and the Phoenix defense blows the switch. Here's another example that comes to mind for some reason at 12:40 in the a.m. Remember all the heat Amare took for not switching on that screen and following Finley out to the three point line?
The opposing shooter gets open and hits the big shot. A play is run and the Suns defender fails to switch on a screen. The game is close and the Suns need to execute on the defensive end.