I was looking at the ''Need Anime Guidance'' thread, and apparently i forgot PortCon was in Maine

I got excited when they said they were from Belfast, I was going to put in a reply ''wow are you from Belfast, Maine!?''. Then I realised a second later... ''Duh it's
PortConMaine'' Happily I caught myself before I posted anything.
What type of ''Duh'' moments have you had? Did you catch yourself before you may have said or done something dopey?