Stop that Right Now

We went to Stop and Shop last night for oats, kale, and figs. On the way out a boy was making squeaks with his sneakers on the shiny white waxed polished linoleum floor. I smiled turning to the mother. She had straight strawberry-blond hair. She did not smile back. She yelled ahead to her son Stop that right now, stop that right now or you'll have to stay in your room for the night.
Wow, that's harsh. He was just having fun, I said to Bill.
What she means is stop that right now or you won't grow up to become a successful investment banker!