Before the movie's even started properly. Sam takes a long, dramatic walk to the debriefing chamber, escorted by guards and accompanied by tense music every step of the way...including the part where they have to struggle with a malfunctioning gate and then get lost in the corridors and have to backtrack. The music never changes.
Sam offers to talk to a doctor at a targeted clinic, "American to American." The doctor angrily points out that he's Canadian.
After Sam finds out that the soldiers he's working with are planning on killing him, he retreats quickly to the camp and takes a tumble down a hill.
Sam's Narration: So I just stayed calm and made my way back to camp as efficiently as possible.
When Sam first arrives at the Espada Ardiente camp, one of the farmer-soldiers in the foreground is seen maintaining a muzzle-loading weapon. While Beatriz is trying to convince Sam that they're not as poorly-armed as they seem.
Sam tumbles out of the jungle after being "kidnapped" — one of the soldiers in the scouting party radios back to base with, "(subtitled) We found the white guy!"
A little later, Sam tries to stall for time finding the "terrorists" by pretending to get directions confused on the map.
The entire bomb-building scene, where Sam has to enlist a terrified doctor with nothing resembling military experience at all to make a bomb out of equipment from around the clinic.
Sam: Yeah, we're making a bomb, so do the exact opposite of what it says on the warning label.
And then later on, when the doctor proves to be scarily good at making improvised explosives.