Nitpicky BI call?

[Danvrapp]

With new rule 4-6-4 in mind, A1 attempts a dunk, during which he pulls down the ring. However, the ball doesn't go in right away, but instead rattles around a bit, perhaps hitting the glass and / or flange. When A1 releases the ring, it strikes the ball.

Is this BI? If yes, would you actually call this (seems ticky-tack to me)?

By rule, it sounds like it is BI, but I can't find anything to dispute it or support it. We discussed this at our local association meeting last night.