Saturday tunes: Want to give a concert pianist the willies?

Sneak up behind them and whisper, "Rachmaninoff's third piano concerto."

This is the first part of the first movement, marked allegro ma non friggin' troppo." After this it gets a lot nastier.

This is a 1978 performance by Vladimir Horowitz, who first recorded the Third in 1930 and pretty much owned it ever after, with Zubin Mehta and the New York Philharmonic.