The secret of the kingsnake's killer coil revealed: 'Astonishing' constriction forces key to its ability to win battles with larger snakesKingsnakes are the strongest constrictor snakes in the world, researchers found Normally predators avoid prey that are similar in size or larger than they areBut kingsnakes can eat other snakes up to 20 per cent bigger than themselves They wrap around their food tightly like a spring in a 'curly fry pattern'The pressure of their squeeze is so strong that they could even stop blood flow in humans and prevent the heart from pumpingBy CECILE BORKHATARIA