Dragon

Corrected entry: Tommy and Archie shoot the helicopter in the tail rotor thus making it lose control and crash. A helicopter without a tail rotor spins out of control due to the torque effect, so if the main rotor spins clockwise, the body of the helicopter should spin counter-clockwise, because of Newton's Third Law. Yet when the helicopter collapses, just as it's about to hit the ground, both the rotor and the body were spinning in the same direction. (01:25:50)

Correction: The helicopter is shot on the right side. Because of the explosion the rear is being pushed, which leads into spinning clockwise.

Dragon

Corrected entry: Towards the end, Tommy loads the 90mm cannon in the tank to shoot down the helicopter that Ling is holding on to. Tommy "loads" the cannon by loading in a shell. However, he does not secure it by sealing the door that closes off the cannon. If Archie shot the round like that, it probably would have killed Tommy and Archie and destroyed the tank. (01:25:30)

Correction: You only see him put the bullet in and the next shot is Jet Li hanging on the heli. In the meantime, Archie could have told Tommy to close it.

Dragon