Have you ever been in a fog that was so dense it seemed you could reach out and touch it? Late one night, I was driving home after a long day and found myself engulfed in that type of mist. Even from inside my car, it felt tangible. It was pitch black night outside, and the fog was an extra layer hindering my visibility. And to make matters worse, I was driving onto a bridge. Scenes from many a classic spook film flew into my mind, but I pushed them aside as I gripped the steering wheel tightly. No efforts on my part helped my vision improve. If you’ve…