The event I made the Hell Mouth entry way for had snow, yes SNOW all day long, 2 days before Halloween! It was cold and windy and we still had a full feast and a good time! Here is one of the only pictures of the Hell Mouth I did in place. It is about 9 feet tall and as wide as a very large sheet (I forget the mesurments exactly). I had to add strips on the side and the wind blew them around in this picture. Acrylics, latex house paint, on a sheet.