These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Untwist: If Generalissimo Mendez's smile and soothing voice didn't give it away, he's the one who shot down Stern's C-130 over the jungle, so that he could avoid paying the reward money. The plane wasn't even carrying any money, since he had just sent Stern back empty-handed. If this reveal shocked you, you probably weren't paying attention to begin with.