He throws the ball with such force that his eyeballs momentarily detach from his head. And, of course, Bart's collisions are well worth the effort. Bart runs off stage right as Homer heaves the ball with all his might. The ball bounces off the wall. Bart runs off stage right.
Homer throws the ball.
Cut back to Homer and Lisa watching. Bart runs faster. Bart hurdles the fence. Bart leaps over a huge ditch. Bart jumps off the cliff and remains syspended in midair.