Mary hurled herself at them, fists flailing.

He took a quick step forward, fists flailing with the sweep of a windmill.

You could too easily imagine the eyes flaring and the thing standing up and striding forward, fists flailing like sledgehammers.

He bounded out of bed and vaulted at the red-haired boy, fists flailing.

She launched herself at Gabriel, fists flailing.

He plowed into the second, his fists flailing.

He darted at Pete, his fists flailing.

They were all around him now, fists flailing at him from all sides.

A city man, fists flailing, charged Arigh Arghun's son, who was not much more than half as big.