i ususally just say something that makes them feel stupid...

just be like, "how's your wife doing?"

Hahaha! Good one. I was thinking along the lines of "i'd appreciate it if you didn't open your rotten trap toward me. you're a sad man, who needs to get over himself. die or get better!"

OR, "Now i know why she left you!"

Man, you are going for full emotional obliteration, eh?

Say it with me now, 'Nothing is off limits and no one is out of bounds'