Could the person, near the track with a video camera, in the video, be Autistic?
Since they did not respond to those yelling at them as well as no reaction to being physically moved to safety by someone else, there may be issues in that area.
If so, they may well be extrememly focused on something (like 4014) and have no situational awareness beyond what they are focused on.
Perhaps the person is not an idiot, they may simply have a medical condition.
If they do have a medical condition, they should have a friend watching out for them while they are out enjoying various activities.
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www.webmd.com]
I'm simply glad that someone interviened to save the camera person from major injury or death.
Cheers!