Perhaps not my all time favourite since there was really nothing at stake but I lied it very much.
Playing with a student on a local tourney, I was a very young pro, this was my only client (and was for many years), I have to face my father on the last round.
First board is a total average.
Second one they get to 4
♥ vulnerable, but we bid 4
♠ over it, my dad goes on the tank and bids 5
♥.
I had something like
♠AK10xx
♥xxx
♦A
♣Qxxx. So I double based on leading my stiff ace, underlead
♠AK and get my ruff. And that´s the only defence to beat it
+200 was an uncontested top, but best of all is I comfort my father: Don't worry, I think you scored better than the rest of opponents on average... yup, we did 75.24% that season