Have four campers about the same height sit back to back in middled of parachute with arms up to make a sort of box.
Then have campers holding parachute walk to the right until parachute is tighly around campers in middle. They will be wrapped in parachute like a cinnamon roll.
Count to three and have campers holding parachute pull back as hard as they can.
This makes the campers in middle spin around fast.