There&#x27;s a beautiful illustration of this principle from the NFL, of all places. When quarterback Andrew Luck gets sacked, he enthusiastically compliments his tackler for a great play. It completely messes up the opponent&#x27;s psyche, at least according to this darkly funny Wall Street Journal story:<p><a href="http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;andrew-luck-the-nfls-most-perplexing-trash-talker-1418663249" rel="nofollow">http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;andrew-luck-the-nfls-most-perple...</a>