Mine happened during one written review -
My wife had studied a head and quickly wrote down all of the answers and then went back to the Baby room, with our infant daughter.
As the time started winding down I was behind so I copied down the rest of her answers, including those for the fill in the blank portion. I decided to answer one of the fill in the blank questions using one of her answers.
I can't remember the question but I recall my answer, "The Jews"
BUZZ. WRONG. BUZZ.
the correct answer was "Jehovah's Witnesses", which my wife had abbreviated as "JWS", and I had miscopied as "Jews".