In Writing with Hitchcock (2001), Steven DeRosa noted that Hitchcock supervised them through every draft, asking that they tell the story visually. He told Roger Ebert in 1969: Once the screenplay is finished, I'd just as soon not make the film at all.
A drop kick is a type of kick in various codes of football. It involves a player dropping the ball and then kicking it when it bounces off the ground.
Foot drop is a term that refers to a weakening of the muscles that allow for flexing of the ankle and toes. This condition causes the individual to drag the front of the foot while walking. To compensate for this dragging, the patient will bend the knee to lift the foot higher than in a normal stride (high steppage gait). Foot drop typically affects the muscles responsible for moving the ankle and foot upward, specifically the anterior tibialis, extensor halluces longus, and extensor digitorum longus. A quick test for foot drop is to try to walk on the heels. If this is difficult, foot drop may be present.