Revealing mistake: In the day following the Rider's first ride, Cage shows up at the street that has been burned down the center. A person very close to the beginning of that scene walks on the broken up rocks and it moves as if it were a pad or a sponge. It wasn't a rock moving because the street moves with the rock. It happens a couple of times during that scene.
Revealing mistake: After the Ghost Rider escapes from jail, he is shown pulling his chain whip off of his bike and wrapping it around his torso. As he lifts his leg to mount the bike, the section of chain near his right hip can be seen to pass through his jacket, revealing that it is a CGI chain, not a real one.