There were two hunters who had never hunted before, so they took a hunters safety course. In this course it was stressed that if you ever got lost in the woods, firing three shots in the air was the universal signal that you needed help.
The very first day of hunting the two hunters became lost. It started to get dark, so one of the hunters said that they better shoot three times into the air so that someone would come help them. They shot three times into the air and waited three hours but no one came. One hunter said that they should shoot three more times. They did so and waited three more hours but still no one came. One hunter said they should shoot three more times and the other hunter said that he could not do so. With that the first hunter asked,
"Why not?" The second hunter replies,
"I only have two arrows left."