Step 1:The tennis ball falls off the tee and bounces on a clipboard.
Step 2: The clipboard turns forward 90 degrees launching a penny into the air.
Step 3: The penny falls into a funnel hitting a nail making a it turn in a circle.
Step 4: That nail in turn hits another nail making it turn into another nail causing a chain reaction.
Step 5: The last nail hits a ball making it roll into a cup on one side of a pulley.