Filming for the cage scenes between John and Skynet was constantly interrupted by noisy passerby's, including a group of kindergartners, numerous social media influencers, and tourists, all trying to take photos and videos of the location.
Filming was originally set to take place at the Abandoned Murphy Ranch, just outside of Los Angeles, CA. But the location was too far to reach on foot, so the location was changed to the much more easily accessible Abandoned Zoo.
All the debris John Connor walked through in the opening scene was practical. Construction on a nearby freeway was recently completed, and a ton of rubble was dumped under the overpass. Chris .R. Notarile and Michael Edwards were overjoyed when they arrived to film and spotted the massive mounds of rubble.