Why a Fit? Because that's my Puddle Jumper, bitchaz. Why a briefcase? Because I live in a city with crap for parking space, and while I can park on a metre at night and not need to feed it, come morning I have to move it or feed the metre before I get a ticket. Not to mention the fact that street cleaning comes around and there's nowhere else to put the damn car.
It's ridiculous. So? Briefcase. The Japanese already have a version of this! They just need to expand on that idea. And if I could manage to build this thing, I'd make much moolah and could retire once and for all.