"Edison used to work very hard in his research at beta, the faster brain wave frequencies. Then he would reach a "sticking point" and take one of his famous "cat naps". He would doze off in his favorite chair, holding steel balls in the palms of his hands. As he would fall asleep- drifting into alpha- his arms would relax and lower, letting the balls fall into pans on the floor. The noise would wake Edison and very often he would awaken with an idea to continue with his project."