
Revealing mistake: When Popeye's car stops chasing the EL train, there are skid marks from previous takes parallel to the ones that the car just made.

Continuity mistake: At the police station, Cloudy takes the cigarette out of his mouth. A shot later, it's back in. (00:34:56)
Answer: It's a different car of the same make and model that they swapped for the one they tore apart, and in which they hid the drugs in the same place as the original.