Isolde Raftery, NBC News:

When Jonathan Frieman of San Rafael, Calif., was pulled over for driving alone in the carpool lane, he argued to the officer that, actually, he did have a passenger.

He waved his corporation papers at the officer, he told NBCBayArea.com, saying that corporations are people under California law.

See, the joke is that corporate personhood is ruining this country.

Actually, the real joke is in the next paragraph:

For 10 years, Frieman says he had been trying to get pulled over to get ticketed and to take his argument to court

TEN YEARS