Description: The boulder was on this contraption like an arm; it was free-spinning and the arm was hidden. The boulder tumbled down the chute, then it had to be taken back if we wanted to do another take. But we couldn't do it again very quickly because we had to put in the stalactites that got broken off as it rolled.    

Description: The boulder was on this contraption like an arm; it was free-spinning and the arm was hidden. The boulder tumbled down the chute, then it had to be taken back if we wanted to do another take. But we couldn't do it again very quickly because we had to put in the stalactites that got broken off as it rolled.