Deliver a clean cross over the mannequin from a set ball and attack the back post. Groove the flight and the header timing.
As the base, but the winger crosses from a stationary ball at the byline, no drive. Emphasise a clean strike, lifting it over the mannequin to the back post, and the striker timing the header. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.