Revealing mistake: Just before the end credits, as Superman is flying past Metropolis and into space, watch the car headlights in the background. The background shot is blatantly sped-up by a large amount, as all of the cars appear to be travelling at huge speeds, even in a traffic jam.
Revealing mistake: During the airplane mishap where Lois is pinned to the ceiling, notice how the force is strong enough to hold her there, but both her hair and ID badge still hang down. (00:38:25)
Revealing mistake: At the baseball field, when Clark is holding the plane's nose he is replaced by an obvious CGI figure with zero facial expression.
Chosen answer: The chunks that fall off the "new" land are actually bits of the earth's crust. Superman had actually drilled himself way beneath the "new" land (under the bottom of the ocean floor) so that he was not in contact with the Kryptonite infected crystal land, so that he could lift it up and get rid of it. It is this earth crust that falls off slowly, revealing the kryptonite crystals beneath, and this is why his strength slowly gets taken away as he flies higher, until there is too much exposed and he loses all his strength.
mandy gasson