Continuity mistake: Beck walks into a bar in the middle of a jungle and soon engages in a conversation with Mariana who is sitting at the end of the bar nursing an orange juice/soda while reading a book. She almost finishes her drink when Beck complains to her that where he comes from "there are bartenders." She then moves over to the bar, taking the almost empty glass with her, and proceeds to serve Beck a beer. When the camera switches angle and zooms in to Beck, slowly cutting Mariana out of view, she's seen taking another sip of orange drink, but now the glass is about half full.
Continuity mistake: When the Rock finally starts using guns, there is one shot where the three holes in his tee shirt are on the right side of his chest, because it is a flipped shot. The holes are on the left side of his chest in every other shot.
Continuity mistake: While Travis and Beck roll down the hill, the Jeep (also rolling down the hill) is nowhere to be seen.
Continuity mistake: When Billy hands over the envelope with the new mission to Beck, Beck is holding an ice bag to his head. Beck then lowers the bag and is about to throw it on the counter when it cuts to a close-up of Beck where his shoulder is perfectly still like he isn't placing the ice bag on the counter at all.
Revealing mistake: The car that falls into the water has a surprising lack of damage after such a long tumble.
Continuity mistake: When The Rock and Seann William Scott are tumbling down the big hill, Seann William Scott is handcuffed as they start but throughout the scene is uncuffed and then cuffed as he tumbles.
Continuity mistake: At the end of the rebel fight where Beck gets beat up by the rebels, he kicks Manito (the main rebel in the fight) on the ground and puts a knife to his throat. As soon as he does this, the knife in his hand is upward, when the shot switches, the knife is being held downward.
Continuity mistake: There's a scene after the bar fight where Beck is leading Travis through the jungle, his scar on his right side disappears then reappears near the end of the scene.
Continuity mistake: When the Rock and the pilot are driving from the airfield to the town, there is a section where you can tell it is two different people entirely sitting in the Jeep. They are passing a sign reading Hell Dorado.
Continuity mistake: When Beck and Travis plunge into the water after their tumble, one shot shows the Jeep rotating numerous times as it falls towards the water, but then in the next shot, it shows the front section of the Jeep splashing into the water.
Factual error: The monkeys that are threatening The Rock when he is hanging in the trees are baboons which are native to Africa, not to the Americas. In a magazine interview about the movie The Rock mentions "howler monkeys" (which are from South America)