Coincidentally, I recently finished reading Arthur C. Clarke's collection of
short stories, _The Nine Billion Names of God_, and one of them (called
"Who's There?") touches on the subject of keeping a cat on a space station.
The narrator of the story had to go outside on a space walk and nearly
scared himself to death when he felt something soft and warm on the back of
his neck. Turned out the space station's cat had had kittens inside his
space suit while it was stored in his locker.

Recently on an episode of _America's Home Videos_ they showed the interior
of a small private plane, during which the pilot was doing parabolas and you
could plainly see his confused dog floating around in the back of the cabin.

An accidental experiment in cat free-fall trajectory was reported by a _Fort
Worth Star-Telegram_ columnist many years ago. Seems a man was hired to
erect and paint a flagpole for a school. He always took his cat everywhere
he went. So, while the cat was dozing on the end of a two-by-six board that
was lying on the ground, the flagpole accidentally got away from the man, it
fell over and landed on the other end of that board. There was a moderate
mound of dirt underneath the board, so when the 60-foot-tall flagpole
crashed onto it, it launched that unsuspecting cat into sub-orbital flight.
"He sailed about 70 feet into the air, flew over the power lines, across
Route 3, and landed in the top of a magnolia tree. He clawed about seven
bushels of leaves off it on the way down."