The "disjointedness" is probably due to the artwork being fed back and forth between some rollers. You can see a significant kink at the bottom of the shredded portion, probably due to it being stored pre-fed into the rollers. The rest of the shredded portion lies flat, suggesting that it has been stored flat -- and may be the original piece.

I find it curious, though, that the piece was made with such a significant lower margin hidden by the frame. It certainly suggests it was created for this stunt.