Frank refused to come in from recess when his teacher blew the whistle, yelled across the playground at the TOP of her lungs, and then ran and hid behind a narrow tree when said teacher marched across the playground to retrieve him. (Unfortunately for FRANK, the principal was standing about five feet from said tree. She was incredibly happy to help.)
He repeated this same offense 1.5 hours later when the class went outside at the end of the day. I retrieved him just in time to get him onto his bus.
Those other hours between said recesses were peppered with many "tugs-of-war" today.
This was the only viable solution.
Lemon Drop. x2.