Originally Posted by MattNelson
Live footage is never live. For the Chopper 4 shot all they had to do was practice their shot from the same position. It would be no sweat to rehearse the footage for the explosion shot, and to create a CGI animation of a plane with a transparent background (or whatever that blurry mess was), so as to have the animation layer ready to go and matching the perspective they would capture the live explosion from. Easy peasy, and really the only way they could pull it off on "live" television (by not showing the crash).