Rules Analysis
A goal is scored when an in-bounds player catches any legal pass in the end zone of attack, and retains possession of the disc throughout all ground contact related to the catch.
To be considered in the end zone after gaining possession of the disc in accordance with II.O.2 and XV.E, the player's first point of ground contact must be completely in the end zone.
If a player clearly lands on his toes first and then continue down onto his heels, his toes are the first point of ground contact. If a player lands fairly flat-footed and it is not possible to determine which part of the foot contacted the ground first, the entire foot is the first point of ground contact.Remember, the end zone line is not part of the end zone.
When an in-bounds player in possession of the disc whose first ground contact will be completely within the end zone loses possession of the disc due to an uncontested foul, or lands out of the end zone due to an uncontested force-out foul (XVI.H.3.b.4), that player is awarded a goal.