data-mm-id=”_406uwtaz2″>It's been a while since we've had a good, high-quality Colin Cowherd metaphor to mull so it was welcome news to see this come across the desk. On Thursday, The Herd primarily discussed the upcoming NFL coaching carousel with Week 18 and then Black Monday around the corner. Mike McCarthy's name came up– not because he is truly in danger of getting canned, but because the Dallas Cowboys might be in the mix for an upgrade if they falter and flop out of the playoffs for the third year in a row. Cowherd described the Cowboys coach as a great television series that you enjoy up until a bad finale that leaves a bad taste in your mouth about the whole thing. "McCarthy is like a like a great TV series and you never really like the season finale."…