A childhood belief about classes

In my elementary school, we had tiled flooring. But there was this one faded spot where the tiles where a different color from all the rest. I remember believing that this was the grave of a child who had been murdered there long ago and had been burried underneath the floor. Especially because this discolored area was the same size as me! :( All my friends believed the myth too. So we'd always walk on the other side of the hallway!