Huddle with coach during free throw?

[Altor]

Watched this take place one night:

Team A is shooting FTs in the first half, coach calls the other four players over during the first. B5 jogs over. He doesn't insert himself into the huddle, but looks over their shoulder and listens while Coach A is giving instructions. A12 realizes what is happening and gives B5 a small shove to push him away from the huddle. Nothing malicious, but can't say I remember if the ball was live when the shove occurred or not. B5 grins and takes a couple steps away. All this occurred with T's back to them. Could have been a bad situation.