A vampire challenges his friend that he can kill faster than him. The go at the edge of a forest to hunt game. The first vampire goes at it, in 15 minutes returns all bloody after making his kill. The second vampire returns in only 1 minute, face all bloody like the other. His friend is amazed, and asks ""How on earth did you do it so quickly?"" The other responds: ""Do you see that tall tree over behind the first line of trees?"" His friend replies: ""Sure, yeah. Why?"" Gasping, he replies: ""I didn't"".