So you've probably heard the Swing Kids version of this, which is great, but the combo of Goodman and Krupa doing the original is something incredible, and you realize why it was such an enormous hit in 1937. Krupa's speed on the drums and Goodman's command of the clarinet and orchestra is flat out genius. You'll note Goodman and Krupa are playing at about 20 bpm faster than the Swing Kids version, and doing it live to boot.