I wish they hadn't done obvious work on the car during it--you can see they installed reinforcement bars and replaced the windshield halfway in, before they started dropping stuff on it. If they made such obvious improvements, I don't believe for a second they didn't make less obvious ones (say during the sea water).
Amiga Workbench, while not a Unix was very capable of this. I used to do 3D Renders in Imagine while making music on OctaMED SoundStudio without drops. Likewise, you could usually carry on during heavy floppy access, whereas most other OSes of the day would hang temporarily.
http://www.youtube.com/watch?v=OVkedyQZfwQ