Neil Armstrong, the first human being to set foot on another celestial body, misspoke his historic line. "That's one small step for man, one giant leap for mankind," as it turns out, was missing a crucial letter when Armstrong spoke it to a live audience back on Earth. What he was supposed to say as he placed his foot on the surface of Luna, the Earth's moon, was: "That's one small step for a man, one giant leap for mankind," thus highlighting the bigger picture of his small step onto the surface of the moon. Thankfully, the 600 million people watching weren't quite as pedantic as we are: The public easily overlooked the mistake, understood the meaning and let it go. Hey, the guy flew to the moon, right? Cut him some slack.