John Taylor had tested children in metal bending. According to Martin Gardner, the controls were inadequate as the children would put paper clips in their pockets and later take one out twisted or be left with metal rods unobserved. James Randi managed to bend an aluminum bar when Taylor was not looking and scratch on it "Bent by Randi". In other experiments, two scientists from the University of Bath examined metal bending with children in a room which was secretly being videotaped through a one-way mirror. The film revealed that the children bent the objects with their hands and feet. Due to the evidence of trickery, Taylor concluded metal bending had no paranormal basis.