There's a guy that stands about 20-30 feet away, ball cap and sunglasses, one hand covering a small mike at his mouth, the other hand in his "camera bag" running the controls. Took about 5 minutes to spot him, then I circled kinda near, and sure enough, what he was saying was broadcast through the trash can with that electronic voice.
Next time you see PUSH, look for the guy (or someone acting like that).