"Then back up your words! Ready! Here's something coming!" That "something" arrived.

Bayliss fairly gasped as Darrin started in on him.
But Dave drew back, holding up his fists.
"You didn't get started fairly, Bayliss," Darry declared.

"I want you to have as fair a show as possible.

Draw in a deep breath.
Fill your lungs with air.

Plant your feet firmly.