Bart looked at her over one shoulder then sighed, relenting, even though she hadn't asked for an leniency. "Okay, you can fly. I want to beat you at your very best." He said, flashing a grin.
Beside, flying was cool. Or at least, it certainly looked cool from the ground. Speaking of-- he would have to ask Kara why Supergirl wore a skirt if she was going to fly above everyone? But that was a question for another day.
Bart leaned towards the ground, putting his fingertips in the grass and stretching one leg out behind him. He pressed only the balls of his feet into the ground, taking up a runner's starting position.