WATCH: The wonder of Severn – rare 'tidal wave' on British river caught on camera Nature THIS is the dramatic moment a rare ‘tidal wave’ surged down the River Severn. Share: Email ThisBlogThis!Share to XShare to Facebook Related Posts:Dramatic moment elephants protect baby from drowning while crossing a riverCute video of Siberian Husky taking life easy in heated poolCute video of Siberian Husky taking life easy in heated poolDramatic moment elephants protect baby from drowning while crossing a riverIs this the biggest huntsman spider EVER? Gigantic arachnid is terrifying arachnophobes