The camera on the white onesie in Scott's hand is what I shot this set with.
So continuing with the photo nerd talk from above, the reason the focus is so weird down the middle in all of these shots is a result of the overlap in the centre. That extra thickness of the overlapped area causes the film(s) to shift slightly out of the film plane. It's not an exact science, but if you're interested in trying this technique out, I wrote up a short little tutorial last year here. Just be prepared for a little bit of frustration fumbling around in the dark (or film change bag) while trying to spool the rolls evenly.
All photos shot with the Rolleiflex 2.8E, on Lomo Lady Grey 400 film, developed in Rodinal, 1+24 for 5:00min at 68 deg. F.