Last year in Week 4, Mike McCarthy challenged a play in order to choose to take a safety rather than a turnover. On the field, the play was ruled a sack/fumble by Jared Allen, recovered by the Vikings at the Packer 2-yard line or so. McCarthy saw that Rodgers' knee was down before the fumble. However, the knee was down in the end zone.I realize it's not the same thing as the Cleveland/Jacksonville game, but definitely a coach CAN challenge to have a score count against his team -- in this case, it was a safety.Edited to add that McCarthy won his challenge, so Minnesota was awarded the safety.