The Golden Snub-nosed Monkey (Rhinopithecus roxellana) was not to be outdone by the Gray Snub-nosed Monkey. He wants us to know that his jaw can unhinge so that he might better eat his human prey whole.
These natives of Sichuan, China, are just over two feet tall (height varies depending on subspecies). They are almost entirely arboreal, and their preferred means of locomotion, sadly, isn't brachiation. They like good ol' fashioned quadrupedal walking. Though they can brachiate, they prefer to leap (as monkeys are so often wont to do).
They are primarily herbivorous, and their favorite food is lichen. Yummy, delicious lichen.
They look a smidge better with their mouths closed, but then you're back to staring at that Skeletor nose and those jet-black eyes.