Weight it into space, time the run. Disguise the through ball and weight it into the space behind the line as the runner times his move to take it in stride.
The passer slides a through ball behind a mannequin line for a runner. Emphasise disguise, the weight of the pass into space (not to feet), and the runner timing his run to stay onside and take it in stride. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.