As I drove home, night had begun to settle with an added veil of heavy fog. When the fog suddenly lifted, I found myself off the road and headed toward a patch of trees. I quickly slammed on my brakes. The low-lying branches of a large pine tree scraped against the hood of my car like hands reaching out to warn me of the ominous trunks just beyond. The dense fog had changed my perception: I had mistaken someone’s back porch-light for the streetlight I knew to be near the curve of the road.