NASA zero gravity release mechanism - photo

NASA zero gravity release mechanism, c. 1966. Full caption: "ZERO GRAVITY RELEASE MECH CHECKOUT TESTS"

Fullsize image: https://diqn32j8nouaz.cloudfront.net...avity_test.jpg
https://diqn32j8nouaz.cloudfront.net...ro_gravity.jpg


Previously:

https://www.homemadetools.net/forum/...327#post165831
https://www.homemadetools.net/forum/...941#post133733
https://www.homemadetools.net/forum/...560#post128199
https://www.homemadetools.net/forum/...236#post150073
https://www.homemadetools.net/forum/...325#post135141

Is this like one of those ghost traps they had in "Ghostbusters," except that they've got zero gravity in there, instead of ghosts? And what happens when they release the zero gravity? Enquiring minds want to know.