by Jean » Mar 31st, '13, 11:53
I think what would work (although I can't know for sure) is if the pillow case is made of a very light and smooth fabric such as silk, while the mask is made of a more heavy but still smooth fabric like leather.
You could attach some push buttons or small patches of Velcro to the pillow / mask so they hold together easily, and when you put the pillow / mask on, you separate them at the same time, under the guise of straightening / adjusting the pillow.
Don't forget to consider breathing holes, stage lighting and the heat it generates, also make sure your volunteer isn't claustrophobic. Personally I'd freak the f*** out if I had to stand or sit on stage with a sack on my head for too long.
Invoke not reason. In the end it is too small a deity.