Stupidity: Like in a previous movie adaptation (and unlike the novel), Lombard finds out way ahead of time that only another 'Indian' is left besides him, and knows they have the gun, but he lead them to the last body turning their back and leaving the gun to them, against any logic and declared purpose. It makes even less sense in this version than in the 1945 version, given the outcome. In the novel, the gun is stolen from him.
Stupidity: Ilona Bergen's murder happening as shown is laughable; she sees the hand with the syringe coming, slowly, at her, and not only she can't defend herself or avoid it (because, damsels in distress in the 60s, you know), but she does not even scream. There's no way the killer could have been sure, or even take a calculated risk, to murder her in such a way. (00:55:25)
