Audio problem: When the CT technician asks John if he'd like some help getting down, John says "Thank you very much", but you can tell that he's not saying anything and that the line is just dubbed in. (True, the camera is facing away from him, but his jaw and face aren't moving at all.)
Audio problem: When John wakes up after the surgery, his lines "Hemoglobin's normal" and "After that, what happens then?" are obviously dubbed in after the fact. His voice is much louder than he appears to be speaking, revealing that they were re-recorded during post-production.
