Bear Grylls visibly trembles in the moments before he throws himself into a scenario that scares the hell out of him.
He is not dropped into the middle of the desert or the Arctic with only the bare necessities. Grylls is not preparing to face off against a venomous snake or a real bear, nor is he preparing his stomach to eat a moose's heart or the eyeball of a yak, or to slurp a bright yellow liquid that is definitely not apple juice.