When I hear about theme park accidents, my first reaction is always: must have been a shadowy operation. The kind of rides for which the operators deserve the designee "carnies" -- the ones who pack up and disappear after a wild long weekend of cotton candy, elephant ears and brightly-colored rolls of tickets. Not Disney. No, not Walt Disney (NYSE: DIS)!

But the Magic Kingdom was a little less magic today as several visitors were injured on a water ride at Walt Disney World in Florida. Although they weren't hurt badly and it didn't seem a hugely structural problem -- the exit platform was faulty, said Disney -- it's nonetheless a shattering of my preconceptions: that Disney is in an entirely different category than those other guys, with their poorly-screened (or not screened at all) staff and their less-polished rides.

Disney stock had suffered a bit this evening, down 44 cents or 1.22% to $35.59 on the day, then down another 12 cents in after-hours trading despite strong Pirates of the Caribbean: At World's End numbers. Will there be more damage before the week is out, or is this a temporary setback? The appearance of the phrase "Disney accident" on Google's Hot Trends ranking can't be great tidings.