Do any of these count . . . ?
I've mentioned several times before on AB that I once lost a train. (It was on Platform 1 when the branch line was closed for emergency engineering work but then, several hours later after the line had been repaired, I put out a PA announcement inviting passengers to board the train on Platform 1, it had vanished!)
A conference speech I made, defending the rights of gay school pupils, got reported on the front page of the The Telegraph in such a way that it appeared that I'd said everyone should be gay!
I've danced with a former 'Miss England'.
I've sat through a two-hour lecture on mathematics, not understanding a word of it because I'd not realised beforehand
that it would be delivered in Japanese.