My two favorites both happened to me.......
1- when you know crew scheds had to have dialed 20+ numbers to get your room,, then asks "Where are you????'. "I don't know, figure it out and call me back" click.
2- when crew scheds asks "What Z-time is it where you are?" .... I !!!!! you not.
The winner,, game,set and match....
If you've ever flown a flight were V1 was starter cut-out on #4....
--heracles