A few years ago I was driving back to my house from a friend's about 2 am. I was getting close to my house, in a really rural area with corn fields on both sides of the road. All of a sudden I saw stalks of corn blocking my path... going straight across the road from one field from another. Nobody is around, no cars, no houses, just my headlights shining on upright corn stalks standing across the road, as thick as the fields to either side. I knew I wasn't lost or anything - I drove home this way every day - and stopped the car on the road, just staring at the corn stalks trying to figure out what the fuck to do. After sitting there for a minute, I decided that staring at the corn waiting for something to happen was much scarier than doing something. So I hit the gas, hoping the corn would just fall down in front of my small car. It was one of the strangest feelings driving through the corn - I imagine it is what it would feel like to run through Platform 9 3/4 for Harry Potter. One second I was staring at what seemed to be a solid field of corn, and the next my car is easily knocking the stalks over and I was through. The rows of corn across the road weren't as deep as I had thought, and in no time I was on the other side looking in the rear view mirror at a wall of corn with a now gaping hole in it. Went home, went to bed still freaked out. The next morning I went to leave, drove down the same road... and the only sign of the corn was a few stalks lying next to the road. I still have no idea how that happened.
TL;DR - Mysterious wall of corn blocks road at night, gone by morning