Disbelief in sarcastic form.
(As commonly used on the show Grey's Anatomy)
Meredith: You didn't sign the divorce papers. Fine. I get it. End of discussion.
Derek: Oh... I usually just say "Meredith" and then you yell at me. I haven’t thought past that point. I actually didn’t have anything planned. Meredith hits him repeatedly with her purse Derek: Listen! Hey stop it! Ow!
Meredith: Seriously? Seriously?!