Best resignation I faced over the board was in 1977 when smoking was allowed in public, I was playing Lou Prescott a pipe smoker. I was 3 moves from checkmate and Lou Prescott resigned by picking up his king and dropping it in the Ashtray!??
Funny
I missed mate vs Daniel(1400).
In my defense, I was going fast and didn't expect that from him. 
I still won, though. 
I once hung both my queen and my rook in an otb game when I had an easy person last game which I should've won
i was up by a queen but lost a careless mate in one in the same game the other day
cool
I accepted a draw from my opponent in a winning position
i did the same, i was up around 3 on the analysis after my opponent accepted my draw
Forgive me Grand Master, for my Queen has sinned. She thinks about mating with an enemy King.
You know how most of the time I don't use much punctuation?
That would be because some time last late summer/early autumn I had bad tilt and threw a heavy object at the computer and now a bunch of the keys don't work.
If I really want to use a comma I copy and paste one from elsewhere.
I'm working on it.
I force myself to take breaks before it gets really bad now.
I thought a game was a draw and the person I was playing with agreed. We shook hands and concluded the game. Then I realized it wasn't a draw and I had one legal move.
I was winning against a 1600 in a fide rated tournament but i blundered a fork
I once gave a draw two moves from a win, not seeing it till after the draw offer.
I used to childishly insult people who had a very lucky win and didn't rematch
I used to childishly insult people who had a very lucky win and didn't rematch
I'm certain most of us have done this.
Once I resigned in a fair position, because I thought I had blundered a rook.