Carnival Cruise Lines is no fish out of water when it comes to advertising on land. Check out the clever out-of-home work it's been doing lately, courtesy of ad agency Arnold. The fire-escape ad, in particular, is eye-catching. (Shame the water slide isn't operational—it could snake down into a water-filled dumpster.) Two more executions after the jump—one with parrots atop a billboard, the other a taxi-top that uses GPS to tell people how far they are from port. Via Ads of the World.