This is a hilarious classic I've had quite awhile, from the CI archives. Some NASA and/or Air Force guys take a cat up on the Vomit Comet, which is the nickname given to a plane that flies a special aerial parabola, thus giving the passengers a few moments of weightlessness.

Needless to say, this specimen of felis catus is entirely unprepared for Zero-G.

Video: 2.0mb MOV