Mini's new Rocketman concept has some neat features, like a double-hinged door so you can get in and out while parked in tight spaces and a rear trunk with a drawer-style door. That latter feature in particular should come in
handy in urban parking situations, where some jerk is inevitably parked right up on you; with this you could stand curb-side and open the drawer for access. And the rear taillights are actually free-standing modules perched atop the car's haunches, obviating the need to carve precious space out of the car body itself. 
