Well, I did snap the tail off a lizard and gnawed on it a while. Didnt do much for me, besides taste like bloody rubber. Ate the fruit of a prickly pear catus, much better. A real high spot two hours into a three hour hands and knees evasion through waist high scrub in the High Sierra. About the rudest thing I saw in my training was after the instructor broke the neck of the nice bunny, and cleaned it. Cut a bloody hunk of tissue out of the chest cavity, held it to his lips, and blew. "The lungs can make a great fishing bobber".
I know my instructors (three different survival and evasion courses) would have said BG was an idiot with a lot of stuff he does. I know its entertainment, and done for shock value, and thats fine. But his choices are only logical if you have backup. Youd never take such chances with no help.