Suddenly, Jon had an idea.
"You may be cute, but there's more to being a cheerleader than that! Are you sure you can do the routines?"
"Those are a piece of cake," said his mother.
"Oh, yeah. Betcha can't do a good cartwheel!"
"Betcha I can!" And without any more notice, she did a perfect cartwheel ...
... and the rock flew out of her hand in the middle of it. Like a flash, Jon had the rock in HIS hand!
"Hey!" said his mother. "That wasn't nice!"