Someone starts by claiming the hill and then the next person tries to claim it as their own, like so:
Person1: *Places flag with face on it at the top of the hill* MY HILL!!
Person2: *Knocks Person1 off the hill with a baseball bat* MY HILL!
Person2: *Shoots person2 in the head* MY HILL!
Ya get the idea.
Begin:
*dances around on the hill* MY HILL!