Rare one-point safety in Fiesta Bowl, rule explained

In last night's Fiesta Bowl, there was a rare occurrence. For just the fourth time known in college football history, a one-point safety was scored by Oregon against Kansas State.  A one-point safety can be scored on an extra point attempt if the team on defense obtains possession of the ball as a result of a turnover such as a blocked kick, interception, or fumble and retreats back or laterals the ball back into the end zone followed by the player possessing the ball either being tackled down, downing the ball, or fumbling the ball out of the back of the end zone. Another very extreme way to score a one-point safety would be if an offensive player was sacked in their own end zone on an extra point which is 98 yards away, but that type has never occurred.  I just coincidentally looked up the one-point safety rule last week since an article from CFU was referenced by the blog called The One-Point Safety. The author of the blog, Travis Normand, witnessed live the one-point safety ...