Hidden bad, thin and dangerous ice in Mo's Slough No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip Knut Kielland shows how snow can cover and hide bad, thin and dangerous ice in Mo's Slough. Process Observed: Snow InsulationThin IceUnsafe Ice Date Process Observed: Friday, February 12, 2010 Galleries: Mo's Slough 2 Gallery