[EarthIsHome]

In the video:

> It just rolled off the runway behind you.

[pimlottc]

That doesn't really answer it, most tires hold enough shape to be able to roll on their own.

[daveslash]

You're right, they do. And I'm certainly no expert, but I have a more difficult time imagining a tire coming off the wheel intact without some catastrophic "blowout" impeding it's ability to smoothly roll than I do imagining a whole wheel coming off.