As Seller, an encyclopedia salesman, approached the grounds on which Hermit's house was situated, he saw a sign that said, "No salesmen. Trespassers will be prosecuted. Proceed at your own risk." Although Seller had not been invited to enter, he ignored the sign and drove up the driveway toward the house. As he rounded a curve, a powerful explosive charge buried in the driveway exploded, and Seller was injured. Can Seller recover damages from Hermit for his injuries? 
Yes, if Hermit was responsible for the explosive charge under the driveway.  Yes, unless Hermit, when he planted the charge, intended only to deter, not to harm, a possible intruder.  No, because Seller ignored the sign, which warned him against proceeding further.  No, if Hermit reasonably feared that intruders would come and harm him or his family. 