My boss last week backed me up with a client. I was working in a production enviorment and the client refused to test the changes made when I told them. So we things started to go wrong and they called to my boss complaning.

He said:
Well you are right. The things are broken but he (me) stayed last night waiting for your response and you didn't gave one. So he is going to work only in the afternoon and you will have to wait.

I must buy a beer for my boss.