Jordan Mechner has been posting his development journals from the original Prince of Persia -- from twenty-three years ago.
Recently he put up the video he shot as an animation reference for the Prince's moves. It's his brother David running, jumping, and climbing around a parking lot. If you've ever played the game, you will bounce straight up in the air and shout "That's it! That's exactly it!"
Watch the Prince of Persia reference video.
But it's also worth browsing through Mechner's other entries (there aren't too many). This early comment is both delightful and a little heartbreaking:
And... the games business is drying up. Karateka may make me as little as $75,000 all told, and it’s at the top of the charts. There’s no guarantee the new game will be as successful. Or that there will even be a computer games market a couple of years from now. (July 5, 1985)