I don't think a back hatch egress would be feasible in an Elio (unless your head was on fire and your ass was catchin' - Charlie Daniels). The rear seater would have to somehow fold down the rear seat to get to the opening with no room to move left or right, and by the looks of Paul poking his head out of the rear in one of the famous Elio pics, you'd have to be pretty lean to pull it off. Sunroof, on the other hand, may just work.