Maybe they are implying that it doubles as an outside storage shed. When not in mobile use, you can store all your old trunks and suitcases in to it. Maybe. And yes, as shown, it presents as a 'stretch'.
My older brother owned three Minis, all of which he wrecked. The first he parked on a long sweeping blind bend as he phoned his girlfriend from the near-by phone box. An uninsured driver in an old Holden wagon swept around the bend and shortened that mini considerably. Mind you, it could not afford to be shortened further.
The second he was driving around the area at which he was at teachers college. Arriving, at night, at a bifurcation in the road after an outing, both he and his passenger tugged at the wheel as they deliberated as to the right direction to take. End result was straight up the middle, and another shortened Mini. This time shortened in the front.
The third, and most dramatic, was whilst I was a passenger. Returning home from Saturday work, after helping dad, my brother became irritated at the placement of the 'silent cop' that he needed to negotiate. Solution, just drive straight over the top of it. Now a standard Mini does not enjoy much ground clearance, but a slightly lowered one less so. Result being that the sump was hit bang in the middle, but not as you might think, tearing it away. No, it ripped the whole engine away from the mounts. As a passenger, reading the paper at the time, my whole world became a sea of dust and buckling metal. The floor pan buckled under my feet, the gear stick popped up further though the floor and the windscreen all but came out as this little car took on a revised shape. And the dust! We got out, dazed and surprised, then pushed this little car in to a near-by side street. Not one single drop of oil was spilt from the sump. This time shortened in the middle. I kid you not.
I often wondered what those kids whom my brother went on to teach were actually taught.