When Frank answers the pay phone and has his car

stolen, he quickly runs after the car, steals a

bike and keeps up with the car so he don't die.

At the end of the chase, Frank swings from a bar,

flings himself through a factory window, kicking

through his driver side window, kicking the guy

out of his car through the passenger side door.

The first view, you see him easily flying through

the window as if the window is not up, then the

second view from inside the car you see the driver

side window breaking as he kicks through it.

That's a minuscule slip-up

The real slip-up is that after he kicks through

his driver side window to kick the guy out of

his car, the rest of the movie he has his driver

side window. It's not broken at all.

During the car chase scene, the people chasing

him shoot at him not breaking any windows, and

at the end of the movie when he's trapped on the

bridge, he has a bunch of people shooting at his

apparently bulletproof car, yet still not a single

window breaks. When he drives his car off the

bridge and into the river, he's able to break

through the rear driver side window that was just

bulletproof 2 minutes ago, instead of exiting out

the front driver side window that should already

be broken out from him kicking it in earlier.

Slip-Up: Frank is able to break his bulletproof windows and make them magically reappear!! cool!