Lost in the woods...
A father and son get lost while hunting.
The son says "I heard if you get lost you should shoot in the air three times".
The father says "That is a good idea." and shoots in the air three times.
A couple hours go by and the father shoots three more times in the air.
A couple hours later the son says "It will get dark soon, maybe you should shoot again.". The father says "Okay, but I hope someone finds us soon, I'm running out of arrows".