Hi, Mr. Nature here.
Some of you may not have heard of the horned frog mentioned in the cat video. Well, this is one–a small one. They grow a lot bigger, they have very sharp teeth and powerful jaws, and they do not want to play.
This frog is holding back, probably because he thinks the human hand and arm constitute a snake. He puffs himself up to make it harder for the snake to swallow him. Sooner or later he’ll realize his mistake, and then someone is in for a chomping.