Its been years now, I guess it's safe to say something.

 

The three boys who disrupted the class were told to stay after school.  While waiting for the teacher to return from the front office, they watched in amazement as the eraser, up at the chalkboard, began to move on its own.  It was erasing all the writing that had been left on the board. 

One of the boys became so unnerved that he ran from the room and didn’t slow down until he was halfway home. The two remaining boys sat there stunned, mouths open.

        Then, as if summoned by some spirit, the chalk lifted itself from the tray and began to write. Slowly, deliberately, it scrawled across the clean slate: “I see everything.”

The boys exchanged a terrified glance. One whispered, “Is this some kind of prank?” But the other shook his head, eyes wide. “No one’s here…”

Just then, the classroom door creaked open. The teacher stepped in, oblivious to the supernatural display that had just occurred. The chalk dropped silently to the tray. The board was blank again.

The boys knew what they saw and knew no one would ever believe them.  They both understood they could never say anything.  That is, until now...