[tref]

A1 on a fastbreak tableside at the FT line extended with no defender in front of him is still dribbling, about two strides from gathering. At the same time A2 on the opposite side of the frontcourt at the 3 pt line is running slow to hold off B1 from making a play. Frustrated B1 (down by 20 late in the 2nd half) shoves the much smaller A2 in the back & displaced him about 2 feet.
How would you handle this, by rule?
And, do we have any options?