pangolin's defense mechanism

Pangolins are very weird mammals, whose bodies are almost completely covered on large scales, giving them an appearance somewhat reminiscent of a giant, living pine cone. They feed mostly on insects and are found in Africa and Asia. Although they have large, powerful claws on their forelimbs, they rarely use them as weapons; instead, when threatened, they coil into a ball so tight that’s almost impossible to unroll. The sharp edges of the scales make them practically invulnerable to most predators; they can also lash out with their powerful, heavy tail, causing serious injury with the sharp scales.
And that’s not all; a Sumatran pangolin was seen curling into a ball and then actually rolling down a slope at high speed to escape unwanted attention! The pangolin’s last defensive resource is to spray a foul smelling, gooey substance from its anus. Needless to say, this animal doesn’t have many enemies to worry about.