The race between Mr. James Brown and the Devil starts in front of the Four Queens and the Fremont Hotel. They pass both hotels several times before they make it out of Las Vegas onto the two lane road.
When they begin the street race, the Trans Am shoots flames out the back as though nitrous was already activated, but in the next shot, the flames aren't shooting out the back until nitrous is activated.
During the street race, the Driver shifts from 2nd to 3rd, then to 4th and then re-shifts to 4th from 3rd when James Brown tells him to "get down and go for it!"