 The interiors of the Venetian sinking house were a rig built at the  Paddock Tank at Pinewood Studios and it could be immersed in  nineteen feet of water. It weighed 90 tons and used a mixture of  hydraulics and electronics. A computer controlled the hydraulic  valves as well as a third scale model of the building which was used  for shooting exteriors. Water was pushed upwards by banks of  compressors controlled by technicians. It was not actors but crew  who for once were the ones responsible for bringing the house down.