Throw-In, or Not?

[Freddy]

Originally Posted by bob jenkins

A scores a basket. B1 and the ball are out-of-bounds.

Under what circumstances, if any, may B1 release the ball such that B2 possesses the ball inbounds and have it NOT count as an throw-in (so that B2 can carry the ball back OOB and then complete a throw-in)?

For example, can B1 bat the ball to B2? Can B1 hold the ball and direct it to B2? What if it's obvious to everyone that B2 is *supposed* to be the inbounder? Does any of that matter?

Or, does B1 always *become* the inbounder, and the play described is a violation?

4-42-1: The thrower is the player who attempts to make a throw-in.
4-42-3: The throw-in and the throw-in count begin when the ball is at the disposal of a player of the team entitled to it.
7-6-2: The throw-in begins when the ball is at the disposal of a player of the team entitled to the throw-in.

Other than the reasonable discretion employed on a lower-level game, I'm trying to put all these together to come up with a reason not to call a throw-in violation.