When Jim and the gunmen's car stop at the traffic light, they are in an obvious commercial area, but when the gunman gets into Jims car, they are now in a residential area.
While singing in the bar, Warwick is performing a convincing lip-sync until near the end of the song when she looks down and clearly misses a few words.
When Rockford pushes the green Ford LTD out of his way with the dumpster, you can see a roller under the LTD to help it move.
Since Angel served time along with Rockford, it's odd that Angel and Gandy don't know one another; even odder is Angel had never heard of him.