When Tony is in the street during the quick draw scene there is a visible building and tower transmitter on the hill in the distance. The hill is Mt. Lee and on the other side of the hill is the famed HOLLYWOOD sign.
When Tony is introducing himself to Sedgwick, the sound of a large, propeller-driven aircraft is heard. The Air National Guard base in Van Nuys is near the Columbia Ranch where the exteriors were shot and many C-130 cargo aircraft are based there.