tourist has urged visitors to obey safety signs after he "nearly died" when he fell down a 20ft waterfall.br br Matt Horsfall, 39, scaled the rocks forming the waterfall at Dockber Farm near Sawley in Lancashire when he was attending the Beat-Herder music festival on site. He ignored a 'do not enter' sign which warned of "sharp rocks" and said the "water is poison" to pose for a video.br br But he tumbled off when his foot slipped - leaving him with unable to move for a few minutes, a bruised back and a wrist which still causes him pain. Matt, who lives nearby and who works in hospitality, said: "I nearly died.