It's rare that we see footage like this, but yesterday during a Penguins-Sabres game, Pittsburgh head coach Mike Sullivan literally got into it with some Buffalo fans behind him. Fans were banging on the glass behind the coach and it sent the coach into a tailspin. These are pretty rare moments to see, as usually coaching staffs seem pretty stoic to the action happening around them by the fans on hand. See the images here : <div align='center' class='pl20 pr20'><blockquote class='twitter-tweet' data-lang='en'><a href='https://twitter.com/Sportsnet/status/1587989875269292033?s=20&t=LXCIRzoScM7zctr3XKNaQw&fbclid=IwAR3Zaq8leAyCJNj3dcYsHrPueHV0uxa_o43JzGxnguCtGshoXldl2VfFeyk'> </a></blockquote></div> Source: Marqueur.com