Jump stop vs "up and down"

[sseltser]

While driving towards the basket, A1 gathers the ball with one foot on the floor. He jumps off of that foot, and in the official's judgment, intends to perform a jump stop. Before both his feet land simultaneously, he throws the ball in an attempt for goal. The ball obviously has a chance to enter the basket, and while on its downward flight, B1 slaps the ball away.

JR's ruling: No goaltending. This is not a try because A1 left the floor intending to do a jump stop, not try for goal.