Visible crew/equipment: When Max enters Barter town for the first time, right before the shot where he hands over his weapons at the entrance, a microphone from filming can be seen in the upper left corner of the screen, rather obvious to spot although the background is dark.
Visible crew/equipment: In the opening sequence after Max is robbed of his vehicle, he walks up to a pair of boots that has a Bosun's whistle in the strap. As the camera looks at it, the cameraman and equipment can be seen beside Max in the reflection as he reaches down.
Chosen answer: The train tracks would have been covered by dirt for not being used for years. The truck was already cranked, as the engine was source for the generating power and lights. The exit was boarded up and the truck ripped through it. The kids were not prepared, but did observe what the adults were doing and could have been given instructions on what to do.