It was a couple of hours into a day-long shoot. It was hot out, and to say that we were sweating would be putting it lightly. Being a pretty barebones shoot, we were passing the video camera around quite a bit. Many a sweaty eyeball was pressed up against that poor viewfinder. As I strained to look through the slippery sweat-covered eyecup, it occurred to me that this might not be all that sanitary.