Crash lenses, crash cams, glass for gimbals, and handheld camera supports...
Mentioned during the chat:
On “A Clockwork Orange”: To film Alex's suicide attempt from his own perspective, a Newman Sinclair camera enclosed in a custom-built plastic box was thrown off a building six times until it finally landed pointing downwards. It broke the lens, but the camera itself survived otherwise unscathed. Stanley Kubrick later marveled at the durability of this particular type of camera. https://www.imdb.com/title/tt0066921/trivia?item=tr0734570