These Czech animatronic statues realistically urinate on the trough before them, moving their hips and organs in concert. Their "pee" spells out quotes from famous Prague residents.
While they are peeing, the two figures move realistically. An electric mechanism driven by a couple of microprocessors swivels the upper part of the body, while the penis goes up and down. The stream of water writes quotes from famous Prague residents.Link (via JWZ)
Visitor can interupt them by sending SMS message from mobile phone to a number, displayed next to the sculptures. The living statue then 'writes' the text of the message, before carrying on as before.