There are few car collections that can rival Jay Leno's. Now that his 20 years as host of the "Tonight Show" has come to an end, Leno will undoubtedly be spending more time with his beloved cars.

On Friday, the stand-up comedian, 74, was seen popping his head out of the top of the tactical vehicle as he rolled down a residential street in a clip taken by locals. The tank was outfitted with ...