Anybody who believes the Apollo missions were faked needs to consult this hilarious footage of astronauts tripping all over themselves on the Moon. Would the U.S. government allow these AFHV-quality outtakes to exist if it was trying to maintain the appearance of a highly sophisticated space program? Doubtful. As one amused YouTube commenter notes: "haha they almost look like babies learning how to walk."
(Hat tip to the Atlantic's Kasia Cieplak-Mayr von Baldegg for posting this perennial favorite, and to Joel Ivy for compiling it.)