I wasn't so much interested in reopening the topic, only tracking down that unsourced caseplay.
Anyhow, here's the play that prompted my search:
Charge While Though Leaning Back
And here's the old casebook that disappeared that, at least at one time anyway, distinguished NFHS from NCAA-M who has their own caseplay to determine it contrarywise:
10.6.1 SITUATION E: B1 attempts to steal the ball from stationary A1 who is holding the ball. B1 misses the ball and falls to the floor. In dribbling away, A1 contacts B1's leg, loses control of the ball and falls to the floor. RULING: No infraction or foul has occurred and play continues. Unless B1 made an effort to trip or block A1, he/she is entitled to a position on the court even if it is momentarily lying on the floor after falling down.