Unstoppable Joey

Nothing could stop Joey! He was unstoppable!
It was the morning of his birthday, and he stood at the top of the ponderous hill leading down from his neighborhood. He twitched. He laughed to himself and looked all around. Then he was off! He leapt onto the scooter and shot downhill!
Halfway down the speed bump rattled him, but it could not stop him. It was his birthday! Throw caution to the wind!
At the bottom was a cross street. He sped through it, the tiny wheels screaming. He was safe! No car could touch him! Glorious ride! Oh acceleration!