Spotted as I walked across the playground on my way to the office today: A young kid was having fun kicking his football up the two levels of the low-incline handicap ramp leading to the playground. He was so pleased at being able to manoeuvre the ball up the incline that when he reached the top, he punched the air in celebration.
What he didn't anticipate was that after the ball rolled to the top, it rounded the landing and started to roll down the stairs next to the ramp. It then gathered momentum and started to roll down the stairs very rapidly as it followed the law of gravity.
The boy's look of joy turned rapidly to one of anguish and he had to run quickly after the ball before it got away from him at the foot of the stairs. And then he started kicking it up the ramp again.