Rules Analysis
World Flying Disc Federation 2017 Rules of Ultimate
11. Out-of-Bounds
.
11.3.
3
.

An offensive player who is not out-of-bounds is in-bounds.

What:

The 'Greatest': An offensive player realises that they cannot catch the disc in-bounds and jumps from an in-bounds position, catches the disc and throws it before they land out-of-bounds.

Result:

This is a valid pass.

Why:

Rule 11.3.1. states that an airborne player who jumped from in-bounds is still in-bounds.  This lasts until the player lands out-of-bounds and by that time the player has already released the disc.  Therefore, the disc is not out.

A player is allowed to throw the disc while in the air, according to rule 18.2.1.1.

Extra:

A player may not catch their own “greatest” throw.  That is a turnover (13.2.5).

If there is a contested call regarding the catch after a “greatest”, the player who threw the “greatest” should be treated as the last thrower. They should establish a pivot at the point on the field closest to where they released the disc (or on the goal line if this would result in a pivot in their attacking end zone).

11.3.2.
2
.

A thrower in possession of the disc, who contacts the playing field and then touches an out-of-bounds area, is still considered in-bounds.

11.3.2.1.

If the thrower leaves the playing field, they must establish the pivot at the spot on the playing field where they crossed the perimeter line (unless 14.2 is in effect).

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