At one of my haunted houses, I put my husband in a black gauzy robe with a mask that was like an exaggerated scream face in light whitish color. He was almost invisable, and as people went to go by him they would get close to see what "it" was and if it was alive. They would get bent over to him (i had him on a low box), and then at the right second he would make a sudden move with his mask - they always screamed like crazy over that one. The beauty of it is the simplicity of it. lol
