Thanks to wife E. for putting a photo of me on the Internet viewing a 3D movie (apparently with a Jack Nicholson caption). I am returning the favour with a photo of her and her friends -- watching a 3D movie. OBSERVATION: My father and I, about thirty years ago, invented a 3D home movie system. We used polarised light, which worked well. Our concept was published in Silicon Chip magazine some years ago. I don't remember who in fact watched our movies. If you remember it, do drop a comment on my blog.