My inadvertent insult:
We were playing at our vacation home club and came across who I thought I recognized as a world-champion player playing with an unknown older woman.
"Are you Mr. 'X'?, I queried.
"Yes," he replied.
Starstruck, I continued, "May I ask who your partner is?"
"Why, that ...
Well, I held xxxx, - , Axx, AKQxxx - kudos to Eric's and others' analyses - and thought I described my problem with my 4H bid; i.e., that I didn't know the quality of pd's spade suit. Pd, merely bid 4s and I passed. He then excoriated me (BBO) for ...