Maurice Ravel's Boléro premiered at the Paris Opéra on this day in 1928. Legend has it that during this performance a woman yelled "au fou!" ("he's mad!") before leaving. When informed of this, Ravel said, "celle-là, vois-tu, elle a compris." ("that one, you see, she understood.")
Here's the Copenhagen Philharmonic performing Bolero at Copenhagen Central Station. As a flash mob.
Turn the volume up and annoy your neighbours!