About the vision and the herbs and shit. This was really the main part that bugged me. Otherwise I actually enjoyed the movie quite a bit more than I expected to. As some have been attempting to communicate (I think), yes they set up what the herbs did and we all got that. The problem is with an 18th century Indian having ANY FUCKING IDEA what infrared is. For all she knew it fucking saw souls and the herbs masked the soul. Yes, she knew it made people cold, but how would she know what an alien species uses for vision? Let alone how heat vision works.
But ok, somehow she immediately made that logic leap. Next we're forced to assume Predators are almost completely blind outside of IR, as she has to step aside as it walks past her. Can the Predator not see fucking trees and rocks and buildings and shit, since they are ambient temperature? Of course he can. Yet somehow he doesn't notice a "tree" that FUCKING MOVES OUT OF HIS WAY (that he was about to run into no less). Oh, and he's also completely deaf, as he doesn't realize that "tree" is also talking right before he passes it. At least Arnold was usually hiding against the background and not standing in front of a giant IR target where he'd be silhouetted as he moved. If I remember correctly it also tracked him via sound a few times. And didn't he throw a stick to distract it? But how did he see the stick if it is cold??? OMG!
It is on the same level, to me anyway, as that movie bullshit where two characters are standing out in the open, and then a third blindsides one of them from off camera. Motherfucker, just because WE can't see it in the camera frame doesn't mean they were completely invisible to the two characters. They would have seen that asshole miles away. But ACTING! This was similar to that for me. I realize it would have ruined the point of the movie, but we should have seen the Predator walking toward the fire and its huge IR glow, focused on the French asshole, and then suddenly a dark spot moves a step to the side. It pauses, then nonchalantly spears it with his claws, chick dies because she isn't technologically advanced enough to understand how IR works, and then the dog comes and wins the day and fucks bitches for the rest of its life. Fin.