When Max tells Fishman to "get the hell out of here", his lips are not moving.
Technically, as a rule, girls were not allowed to be in Boy Scouts and only boys were allowed to be accepted into the Boy Scouts, only until the year 2018 did the BSA allow girls to join.
Max relies upon Barnhill's assertion that that he climbed Kilimanjaro to prove that he knows how to use rock climbing equipment. It is possible to hike to the top of Kilimanjaro without doing any technical rock climbing.
When Agent McMurrey announces that "there is no good news as of yet", Erickson walks past him, even though he should be out in the woods with Palmer.
While in the river Max moans that his watch is broken, but later on it's working again.
After Max cuts the bridge, in the long shot, Erickson climbs back up to the top of the precipice. In the close-up, he is seen climbing up again.
Crew or equipment visible
When Max looks through Milton's binoculars for the second time you can see the reflection of the crew in the glass.
When Scout Master Erickson begins to climb the rock face and says "that's how its done dough-boy" you can clearly see the wire/safety line swaying and following him as he moves up the rock cliff.
When the short scout boy is on the big branch lying down, it's obviously a grown man stunt on the bird-view shots taken from far away.
When the kids are flicking through the Playboy magazine, the pages are actually blank, just the cover is illustrated.