This isn't the greatest joke around, but since Halloween is coming it befits the season:
Two bats were hanging out in their cave one evening.
One bat said to the other that he was really craving some blood, so he flew out of the cave in search of a victim.
About an hour later he returned, blood still dripping from his mouth. Now hungry himself, the other bat asked him where he had found all that blood, and he replied, "OK . . . you know how when you leave the cave and you see that tree on the left? Well . . . I didn't!"
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