Boa Snake gets its comeuppance after attacking a porcupine and getting pierced by sharp quills. The wince-inducing footage appears to show a snake writhing in pain after being pierced with a porcupine's quills after attempting to eat it. A video captures the Boa constrictor squirming as dozens of white quills protrude from its skin in Brazil. The impaled reptile had apparently attempted to eat the porcupine - but came off worse when the animal defended itself with its sharp quills. The snake slithers and thrashes for almost two minutes, while a man records its pain. Things got even worse for the reptile when the filmmaker's dog bounded over and started barking at it. The wounded snake was forced to coil around to defend itself against the canine.