"Did you know its tradition for women to propose on February 29th?" 

Gulp. "It is?"   

"Yeah, I read it in a magazine this morning."  

"Oh yeah?"    

"Yeah."     

Awkward silence.   

Pam gets down on one knee. "Jim Halpert, would you do me the honour of making me... dinner?"   

"I hate you."   

"Please. You love me."    

"Yeah, yeah."