Trespass

"One is subject to liability to another for trespass, irrespective of whether he thereby causes harm to any legally protected interest of the other, if he intentionally
 * (a) enters land in the possession of the other, or causes a thing or a third person to do so, or
 * (b) remains on the land, or
 * (c) fails to remove from the land a thing which he is under a duty to remove."