They come out of nowhere...

One day while walking in from recess, the students had to go around a large white box truck that was parked in their way.  It looked very similar to this:

Most of the students had no problem recognizing that there was something that they needed to go around, and did so accordingly.  Not Herman, though.  I watched as he approached the truck and went right up to the front and center. He then stopped, took several steps back, and rammed into the truck with his shoulder a full force.

"Herman!" I yelled, "What do you think you're doing?"

"Oh," was his reply, "I didn't see it."