Charles Muntz and Dementia
So probably the darkest moment for me in the movie is when Muntz is describing the different stories the "intruders" gave before they met their apparent fate at his, or his dogs, hands/paws.
He's clearly become paranoid about people trying to steal his elusive bird, and anyone he suspects of such, he kills.
My question is is he still making sane, albeit homicidal choices, or has he lost his mind in the jungle, surrounded by nothing but talking dogs?
The "stories" he said he was given seem pretty plausible.