Footwear which defies the laws of physics, by creating their own localised
gravity field, thus preventing
the astronaut, who is walking around another heavenly body such as the Moon, from floating away into space.
nephew: "There is no gravity
on the Moon."
uncle: "If there was no gravity on the Moon, how did
Neil Armstrong walk on it? Without gravity, he would have
floated off into space!"
nephew: "Easy, he was wearing space boots."