In the "Death Saw" escape/illusion, after the separation of the two parts of the body of David Copperfield the long take ends and there is a shot that shows his bust and frontally the timer that he observes. However his shirt is visibly longer, at least by 15 cm, and also stained with blood, while in the long take in which Copperfield reunites the two parts of his body, the shirt is exactly as it was until the end of the previous long take. That shot does not interfere in any way with the illusion performed in front of a live audience, but it could not have been filmed during the live show itself: it could have been added only during the post-production of the TV special.
The "Floating On The Beach" illusion, which is one of the few conceived and filmed for the TV audience only since it was not possible to have a live audience, contains several errors of video editing. While David Copperfield and his girlfriend ride along the shore of the beach they met two guys. One of them asks Copperfield to watch him while he covers his legs with a towel, and, raising it, the right leg disappears, then the same thing happens with his left leg. At this point Copperfield asks him to borrow the towel to prove that also he is able to perform the trick, but he also shows, raising the towel for a third time, that his legs disappeared simultaneously, as if he was floating. In the shot the shadows are almost absent and in the sea, which is behind him, there is not any boat. The next shot shows that the two guys, watching the empty space under the towel, are incredulous, but then, in the shot showing Copperfield, the shadows are clearly visible, Copperfield and his girlfriend are well lit by the sun and in the sea there is a boat, visible in the same perspective of the girl. Moreover, during the entire performance of Copperfield she kept both hands in her pockets, while in the next shot with her she keeps her arms crossed. So, the two shots must necessarily have been filmed at two different times, contrary to what the video editing would have the TV audience believe.