Band's sound guy is asleep wearing a cop shirt while Tony is playing a ballad. Next shot he's wearing a jacket.
Cigarette in Reno's hand the first time he's seen painting the buffalo.
While the Driller Killer prepares to drill a homeless man in the head, the homeless man continuously changes position between shots, in spite of sleeping soundly enough to not hear the Driller Killer revving his drill.
In one scene, the killer is drilling into the head of a victim at a bus stop with a cordless power drill. In the next scene, he's running down the street with a cord dangling from his drill.
When the Driller Killer drills into a homeless man's head, he does not drill far enough to cause death, as evidenced by the depth of blood on the drill-bit.