My favorite is the "bless your heart" head tilt that strongly implies you're just too damn stupid to follow what they're saying, when it's obvious on its face that they're contradicting themselves.

"I was correctly diagnosed with it before." "Correct." "I do not have it now." "Correct." "It is not 'in remission.' I just do not have the disease." "Correect." "But it isn't curable." "Correct." "So if it wasn't 'cured,' what did happen to it?" {head tilt} "You tell me. Follow it through. You used to have it. You do not have it anymore. It's not in remission. But it also hasn't been cured. What does that leave?" "#$%^! I don't know! That's why I'm here, asking you! As far as I know, all it leaves is contradiction and impossibility!" "Now, now. There's no need to be difficult."

(This is almost word for word the last conversation I had with my GI. I'm not exaggerating. I'm not paraphrasing. I went through it exactly like this, and she responded to me exactly like this.)