During the big chase scene, an Asian police officer 
will come flying out of an alley and get broadsided 
by a streetcar. Look closely at the undercarriage of 
the police car and the road to see a steel wire. The wire 
is secured to the front of the police car's axle, runs 
along the entire undercarriage of the car, and across the 
street into the alley from which the car emerged from. 
You can see it best when you are looking at the driver's 
side of the police car, just when the streetcar rams into 
its passenger side. The wire along the ground will flail 
around on the street because of the slack caused by the 
impact. Also, after the streetcar hits the police car and 
crushes it against another car, a fire will ignite which 
clearly shows the steel cable under the police car. 
car.