Funniest concert I ever played in
We were playing as a wind dectet (2 flutes, 2 oboes, 2 clarinets, 2 bassoons, 2 horns). Due to illness, our bassoon player had to call off, and the conductor decided he was going to fill the gap. Cue everyone staying vaguely in time until the bassoon solo, which said conductor messes up, improvises for three bars (in a Classical piece... very funny, not a good idea though)... and then shouts "TWO THREE FOUR!" to get the rest of us to start playing from the next entry.

When we got off the stage, he congratulated us and asked if we thought anyone had noticed. Err....
(Sivvus trolley collision in the fruit aisle led to a jam, Fri 28 May 2010, 14:54, Reply)