Don't you just hate it when someone hangs up without saying goodbye? I bet you all know some guy from work (I KNOW I DO...) or just a rude friend or relative that ignores saying this little word to put an end to the conversation. I mean WTF? It's nothing. Just say the typical goodbye dude!
Hollywood is much worse. Or it's not important to be polite, next scene pls. Here is a compilation of hang-ups without saying the magic word.