Last year Sr. Girls (varsity girls) Regional playoffs first round (CWOSSAA AAAA Girls for those Canadian refs). After breaking the press a post player has the ball just past half and is standing there dribbling - there is no real pressure on her but she is carrying the ball. I let her get away with a few then blow my whistle to call it - of course at that time she had picked it up.

Coach - "I thought you were going to call the carry there"
Me - "So did I but she picked it up before I could"

My evaluator asked me "How many shades of red is an inadvertent whistle?" - I think the answer is 8.