Crazy things happen when wearing a skull of player.

When I put on a player head of a person, crazy things happened. Randomly I would have a bow floating in front of me, the 3d part of my skin would do the same as the bow. A transparent enderman would appear on top of me. My friends name was not where it was supposed to be and when in F5 and near me, his player model would be upside down and follow the direction of the camera