Throw In After a Basket

[walter]

9.2.2(C) Appears to directly correspond. I just have a question. In that sitch, B2 scores off of the illegal throw-in. The ruling states that a throw-in must be from out of bounds. I have no problem there and totaly agree with the ruling. However, in the sitch posted, they simply started up the floor. If B's coach or a player on the floor realized they did not inbound properly even thought he ball was at their disposal, and had not used 5 seconds yet because I'm assuming the official had started the count, could they do the do-over or is the ruling a violation because of the pass and the start up the floor? Or, what happens if B2 after a dribble ot two realizes the mistake, picks up the ball turns and sprints back to the baseline in an obvious attempt to properly inbound the ball? Too late?