Hummer limos are stupid IMO
Most limos are stupid considering people like to see what they can make and how far it will go. I saw like a 1980 car jacked like 5 feet off the ground with gigantic tires on it in a Target parking lot once. I saw the same with an F-350.
The best thing I've seen was a documentary about some guy taking a couple Ferrari 360's an morphing them to make a limo. It looks a bit odd but it's still kick ass, seeing as how it can still haul ass.

The whole panel on the sides open up for seats. Apparently it wasn't developed for luxury but just to be awesome and ride in a Ferrari limo.