The Peruvian temple interiors were life-sized sets. Abandoned ideas for the temple included a crushing wall trap and a pit concealed by spider-webs. The Golden Idol also had mechanically operated eyes that could follow Jones. The giant boulder, made of fiberglass, plaster and wood was designed to be wide, but this was reduced to weighing . Spielberg liked the effect so much he had its ramp extended to give it more screen time. The boulder was controlled by a steel rod concealed in the wall by rubber rock outcroppings. Ford performed the stunt ten times for the different camera angles. Spielberg said he was an idiot for letting Ford do it, but it would not have looked as good with a stuntman concealing their face. The tarantulas on Molina's body would not move because they were male and non-aggressive. A female spider was put on his chest to encourage movement. For the last part of the scene where Jones flees by plane, the first take ended in near-disaster when the plane crashed from a height of because Ford's dangling leg was blocking the aircraft's right flap.