Dad's Foot in Mouth Talent.
Was walking along my high street with my Dad when he spotted a business client of his - accompanied by his stony-faced wife.
DAD: Hello Roger, how are you?
ROGER: I'm fine thanks.
DAD: (To wife) What's up with you? Why the long face? He's not been smacking you around again has he?
WIFE: I've just had a tumour removed.
Classic Dad moment.
My Grandma and Mother also innocently duetted on a rendition of 'Ching Chong Chinaman' in a lovely Thai restaurant just as the waiters brought us our main course.
The open-mouthed horror of my girlfriend, brother and sister, and their partners was met with a blank 'What? Is that not allowed?' from Grandma.