A1, while holding the ball inbounds near the sideline, touches
(a) player B1;
(b) a photographer;
(c) a coach;
(d) an official, all of whom are out of bounds.
A1 is not out of bounds in
(d). To be out of bounds, A1 must touch the floor or some object on or outside a boundary line. People are not considered to be objects and play continues. Inadvertently touching someone who is out of bounds, without gaining an advantage, is not considered a violation.