Apparently the Vikings DBs decided that they knew more and had a better plan than their Head Coach and Defensive Coordinator. They went "rogue"for the entire first half of their game in regards to covering Jordy Nelson. Nelson lit them up that half.
http://www.espn.com/nfl/story/_/id/18346099/minnesota-vikings-dbs-ditch-coach-mike-zimmer-game-plan-covering-jordy-nelson-green-bay-packers
http://www.espn.com/nfl/story/_/id/18346099/minnesota-vikings-dbs-ditch-coach-mike-zimmer-game-plan-covering-jordy-nelson-green-bay-packers