Clock started in error on throw in

[JS 20]

Team A has the ball for a sideline throw-in with 0.1 (one tenth) of a second on the clock. Thrower A1 throws the ball toward the basket in hopes of a tip-in. The ball strikes the lower corner of the backboard and rebounds up the lane. Right after the ball hits the backboard, the horn sounds. There was no legal touching so the clock should not have started.

How would you proceed in this situation by rule? I didn't have any luck searching the casebook. Thanks.

[APG]

Put .1 back on the clock and throw the ball in from the original spot.

[bob jenkins]

Originally Posted by APG

Put .1 back on the clock and throw the ball in from the original spot.

First, face the scorer, put your hands in front of you with palms up, and then give the "WTF" look.

Then, the above.

[Mark Padgett]

If team A is behind by two points, don't do anything. Game over.