This is the stomach-churning moment a snake struggled to swallow a frog. <br /><br />Swiss tourist Erich Fahrni, 52, saw the rat snake while he was cleaning trash from a river in Chonburi, Thailand, on October 15. <br /><br />Footage shows the rat snake struggling to swallow its prey, which was too big. The snake then gave up and slithered away. <br /><br />Erich said that the frog was lucky it was not eaten by the snake, but not lucky enough as it was already dead from the venom. <br /><br />He said: "Sometimes you are lucky, but sometimes you aren't. This frog was already dead despite the snake giving up."
