Possesion Arrow Error

[Jurassic Referee]

Originally Posted by just another ref

Change it up. A1 has a throw-in under B's basket. B1 reaches across the line, takes the ball out of A1's hands, and quickly dunks. The official then sounds the whistle and signals the technical foul. Does the basket count?

JAR, that has got absolutely nothing to do with what we're arguing.

[just another ref]

Originally Posted by Jurassic Referee

JAR, that has got absolutely nothing to do with what we're arguing.

A technical foul was called for an action during the throw-in. The ball became dead at that point. Not when the official realized it. Not when he blew the whistle. Why is this different?