We had one knucklehead in our Regiment whose attention-gainer was biting the heads off of lizards. He loved the attention he got, so he upped his game: he caught a Mojave Green Rattlesnake and in front of all his startled buddies, started to bite the head off the snake, While the rattler was being chewed, the rattler chewed this ignorant fool's tongue and inside of his mouth.
He quickly realized that this might not have been his greatest idea and threw the snake away - but his throat was swelling shut rapidly and as soon as his leadership was alerted, a helicopter medevac took him to Yucca Valley hospital.
He very nearly died, because the hospital staff was so occupied with laughing that anybody could be that dumb, that they nearly didn't get the antivenin in him in time.
He recovered and was promptly discharged but before he left the Marine Corps, he was required to speak before every battalion in the Division about how stupid he was.