I was out last night at a karaoke bar and had been talking to this chick for maybe 15 minutes. I wasn't super interested, but the bar was still pretty quiet so it was better than sitting alone. We're flirting and kinoing some and then right in the middle of our conversation she goes "Oh no! I left my wedding ring at my husband's house."

My brain did a WTF and blanked out on anything to say so I just raised and eyebrow and kept talking.

What are you guy's best WTF moments?