Nicolas Cage is an avid fan of the "Marvel" comic, and lobbied furiously to play the part of Ghost Rider.
Nicolas Cage's computer generated skull was made from a three dimensional x-ray taken of his actual skull.
(at around 14 mins) The head-on shot showing Johnny Blaze crashing his motorcycle on landing after jumping a long line of trucks is identical to the famous shot of Evel Knievel's crash after a spectacular jump at Caesar's Palace on December 31, 1967.
According to an interview he gave to the New York Times in 2010, this movie was made during the middle of Wes Bentley's decade-long, extremely serious addiction to cocaine and heroin. He said in that interview that he only accepted any movie roles during that time so that he would have money to buy enough drugs.