London rental company Hire Limos imported the 170-inch SUV from the US and told us it costs up to £2,000 a night to hire. "We wanted something different to everything else on the market," explained a spokesman. "Our Hummer is totally unique."
But The Joker isn't the only stretched SUV on the road. Father-of-six Mike Trathen from Plymouth, Devon, spent £31,000 making his Mercedes M-Class 79cm longer. That's 31 inches - or a massive £1,000 per inch!
"I have so many kids, a normal MPV isn't big enough," said Mike. "I didn't want a glorified Ford Transit, and got the idea of stretching my car from a Mazda MX-5 I saw in Germany."
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