The Lunar Landing Walking simulator tipped participants on their side to simulate low gravity. With a “floor” at the correct angle, it’s a surprisingly effective way to reduce a person’s perceived gravity by one-sixth, just like the Moon. At NASA’s Langley research center, this simulator allowed NASA to test the movement capabilities of moon-bound. They learned how high they might be able to jump, and how easily they could get up after falling. In a 1965 demonstration video, the suit-wearer shows off the ease of doing acrobatics in low gravity, but as far as we know, no astronauts attempted such feats while on the Moon.