Sorry, but I dont see a see-saw either which is strictly an up and down motion.
I do remember an article by Soltis---Chess to enjoy. He was explaining how emotion caused many famous blunders. Like the windmill Lasker experienced.
During the game he had been handed a wire telling him the play, that he and his brother had written, was going to be produced. His excitement was so great he fell into this windmill trap.
