no actually its called an
exterior passenger carrier. I have it on mine also.
I got the idea a few years back when i saw little kids sharing one bike, and 1 kids would be standing on a bar on the back wheel.
Anyway, i use it for all my guests, especially the girlfriend. She always complains that she wanted me to get a convertable so her hair can blow in the wind. So when head to the 3, i dont bother unlocking her door, she just walks to the back of the 3 and stands on her personal "exterior passenger carrier"
Sometimes i wonder why she likes it becasue the spare tire is there, it makes for an awkward position becasue her butt is facing the cars, and i feel like shes holding on for dare life when i take it offroads.

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2007 Black H3, Adventure Package, Chrome Appearance, Chrome Cross Bars, Moonroof, Tow Package, Chrome Tubular Assist Steps. "My golly, this is by far the best looking 2007 H3 you will ever never witness"
My H3 is gods gift to man.