A variation of the Monday Morning Quarterback, only its in the Superbowl.
Kurt Warner is a great example of a Superbowl Monday Quarterback. During Superbowl XLIII, He could of let Edgerrin James run the ball in to the end zone and if they failed, they could at least have a Field goal to to tie it up. Instead he throws an interception to James Harrison who returns it for a touchdown. That one play shaped the entire outcome of a Superbowl.
Instead of make history for the Cardinals, Warner made history for the Steelers.