These specimens are kept in little plastic boxes, and are the result of doing something other than what I'm supposed to be doing at work with defective items which our customer can't use (sorry to be so vague). If you're ever in the Portland, OR area, I'd be glad to show you one on one of our hi-resolution microscopes. Most SEMs would fill a closet and cost hundreds of thousands of bucks, so you can't exactly bring one along, but most large universities have a few here and there.
Love your scary dream images. Your dreams are truly scary though; mine are pseudo-scary... I wake up wondering what I was so worked up about.