Busby Berkeley: 'The Polka Dot Polka'

Description by YouTube poster Picklepuss:

Hold on to your hats. Here it comes. The most realistic depiction of what a brain on acid feels like. This wicked awesome tribute to one of the world's most overlooked entities, the polka dot, takes us on a journey to a star that we may never come back from. After the freak out look for Alice Faye, Carmen Miranda, Phil Baker, Benny Goodman, Eugene Pallette, Charlotte Greenwood, Edward Everett Horton, James Ellison and Sheila Ryan in the "Attack of the 50 Foot Polka Dots" right at the end. 1943. Directed by Busby Berkeley.