A pass is a pass, a shot is a shot...

[Back In The Saddle]

I'm trying to understand why this would be legal. In any other circumstances a player who "passed to himself" and moved his pivot in order to get to the pass would have violated, right? Is this legal because the self passer dunks the ball before the pivot foot returns to the floor?

From last year's NCAA case book:
A.R. 108. A1 intercepts a pass and dribbles toward A’s basket for a break-away layup. Near A’s free throw line, A1 legally stops and ends his or her dribble. A1 throws the ball against A’s backboard and follows the throw. While airborne, A1 rebounds the ball off the backboard and dunks. RULING: The play shall be legal since the backboard is equipment located in A1’s half of the playing court, which A1 is entitled to use. (Rule 4-69.4)

The NFHS case book contains this, which does not address the player "following" the toss against the backboard:
9.5 SITUATION: A1 dribbles and comes to a stop after which he/she throws the ball against: (a) his/her own backboard; (b) the opponent’s backboard; or (c) an official and catches the ball after each. RULING: Legal in (a); a team’s own backboard is considered part of that team’s “equipment” and may be used. In (b) and (c), A1 has violated; throwing the ball against an opponent’s backboard or an official constitutes another dribble, provided A1 is first to touch the ball after it strikes the official or the board. (4-4-5; 4-15-2; Fundamental 19)