Dennis Quaid wears an Omega Speedmaster

For most of Innerspace, Dennis Quaid sits sealed inside a pod the size of a blood cell, his face lit by the instrument panel as he argues with the man he is trapped inside. He plays Lieutenant Tuck Pendleton, a hard-drinking Navy pilot who volunteers to be miniaturized and injected into a lab rabbit. A crew of spies raids the experiment, and a fleeing scientist empties the syringe into Jack Putter instead, a panicking supermarket clerk played by Martin Short.

On his wrist is an Omega Speedmaster Professional, better known as the Moonwatch. NASA flight-qualified the Speedmaster in 1965, after running three brands of chronograph through heat and vacuum until only the Omega still kept time, and in July 1969 Buzz Aldrin wore one onto the surface of the Moon. It is a manual-wind chronograph with a tachymeter scale on the bezel. The crystal is plain plastic, picked because plastic cracks instead of bursting into shards inside a spacecraft. Omega still makes it, at around 6,600 dollars, and it remains the only watch NASA has cleared for a spacewalk.

So the cockiest flyer in the movie wears the one watch rated for the vacuum of space, and the story sends him the other way, inward, down past an eardrum and into the current of another man's bloodstream. The closest Tuck Pendleton comes to a spacewalk is a swim through Jack Putter's insides. Innerspace won the Academy Award for Best Visual Effects that year, for turning the inside of a human body into terrain a pilot could navigate.