Dragged through the plane

[assignmentmaker]

Just for fun - we know this could never happen, uh, don't we? - imagine that:

Thrower-in A1 begins an inbounds pass but does not release the ball. In the process, A1 puts the ball, still in both hands, through the plane to the inbounds side. Defender B1 puts a hand on the ball to deny the pass, but does not tie it up sufficiently to justify a held ball whistle. B1 keeps the hand on the ball as A1 withdraws the ball across the plane.

Technical foul on B1 for contacting the ball on the out-of-bounds- side of the plane? Oh, the enticement of it all.