I may be misunderstanding the rule and some of the comments, but this is what I envisioned. The disc clears the mando, gets a tree kick and rolls backward on the wrong side of the mando and lays down on the mando line. It is my understanding, this is not a missed mando?
If it is not a missed mando, the player then must take a stance behind the mando line and make a throw from behind the mando line. Can the player throw the blue path, or must the next throw follow the green line?
Yes, this is just what I'm unclear about. The Lie Rectangle would put you in front of the Mando Plane. I see no mention of Relief similar to what is allowed from an OB Line.