The forum is so slow that I was looking through old threads tonight. I came across a discussion of a particular case play: A1 jumps to attempt a try. B1 fouls A1. The official sounds his/her whistle. Before returning to the floor, A1 then charges into B2 who has legal guarding position.
I saw this exact play happen on the last night of camp yesterday. The official called just the shooting foul against B1, obviously. But I had forgotten about it and it happened exactly as it's described in the case book. Jeez, I wish they'd called both fouls. That would've made a good camp story.