Modern Day Kids

Lance was at his Harston grandparent's house and climbed up on the piano bench.  He was about to lean back on the piano keys, but stopped himself and looked back at the piano for a minute.  Then he turned back around and leaned back on them.  When they played loud, he jumped and said, "Whoa!  I didn't know it was turned on!"  He tried pushing the keys again and when they played again he said, "I thought this was turned off.  There were no lights on.  How do you turn this piano off?"