After the Texans dominated the Patriots all night en route to a 28-22 victory, Bill Belichick and Bill O'Brien had a blink-and-you'll-miss-it handshake (if you can call it that) at midfield. Was the brief exchange because Belichick was annoyed at how his team had played? Or are there lingering bad feelings from last offseason, when the Texans tried to hire Nick Caserio, leading to formal tampering charges from the Patriots?