Continuity mistake: When surrounded by police and a garbage truck, Frank drives his car from the overpass onto the passing transport trailer below, then lands behind a hatchback and in front of two cars - a white compact with a sunroof and a grey hatchback. In one specific shot from atop the trailer, as Frank rolls his window down (before he requests the gun) the only vehicle behind Frank's car is the white compact, which is at the trailer's rear. Note things such as the trailer's safety bars, and the view through the compact's windshield for starters. That grey hatchback is back when the ramp is lowered, for the ensuing crashes.
Continuity mistake: When Frank begins his revenge rampage on Wall Street's men, there's a close-up of Lai bound to the office chair with duct tape across her mouth and the slit Frank made earlier is gone, so at first it's to be presumed that it's a new piece of tape. However, when Lai pokes her head out from the back seat of the car Frank stole, there is a slit in the tape, but when he pulls her and the chair out onto the road the slit's gone, only to return again when Frank brings her to his house.