A friend of mine was playing on a singe player world, and he told me he saw a human looking figure in the distance staring back at him. He was using singleplayer, and I believe inventory edit, from the items in his tool bar.

Whenever he tried to increase distance to far, the figure disappeared into the distance.

He sent me these pictures, and you don't see any name above. I'm unsure on if it was a Herobrine mod or not, but this still creeps me out