shake that cat

It may not be flying, but...

"It's safe to say that no one has ever done a sequence like this in any other film. At least not with a pig."

Jim Henson, in a memo to his staff, regarding shooting the water ballet "Piggy pool" sequence for The Great Muppet Caper, involving, among other preparations, a bubbleless underwater breathing apparatus for puppeteer Frank Oz, a full-size pig costume for the child/actor performing long shots of Miss Piggy diving into the pool, a water choreographer, twelve non-pig swimmers, and a special 50x80x8-foot pool built for the shoot on a soundstage outside London.

Via Jim Henson's Red Book.