On SI's Fan Nation, Chris Ballard says that he once heard a story about Michael Jordan losing a game of one-on-one to a camper at his high-end "Flight School" in Las Vegas.
Lo and behold, after a little research, Ballard was able to watch video of the day John Rogers Jr., founder and CEO of the nation's largest minority-run mutual fund, beat a post-Wizards era Michael Jordan in a game to three.
Interesting story. I agree with Truehoop. The amazing thing isn't that Jordan got beat in one on one but that so few have done it. If anyone has a video of this (it sounds like DVDs are floating out there circulated by Rogers) it needs to be posted.