"Unsquare Dance" is a composition by jazz pianist Dave Brubeck that was released as a single in 1961.

"Unsquare Dance" is driven by a strong bass figure, with percussion provided primarily by the rim of the snare drum and hand claps.

The main theme then develops initially without left accompaniment and then with a characteristic figure based around the use of tenths.

Brubeck says in his liner notes: "Unsquare Dance", in 7/4 time, is a challenge to the foot-tappers, finger-snappers and hand-clappers.

And the laugh you hear at the end is Joe Morello's guffaw of surprise and relief that we had managed to get through the difficult last chorus.