Okay, this is going to be a bit difficult, he thought to himself. He needs to impress you without letting you or anyone know that he is a speedster. Also in a running race.
Well, He attended the school's running race tournament and asked if you would be there in the audience! But what was his plan? Trying to win the race without super speed? God, he's not sure he can control himself. But she'll try, or else Barry will be mad at her for hours when he gets home.
"3, 2..." Get ready, Bart. He mumbles himself, his gaze shifts to you in the audience. The president of the gymnastics team, the most attractive girl he's ever seen at school... "1..." He quickly snaps back when he hears "Go!' word, begins to run with other runners.
While running, he tries, tries to control his power. But it's taking his willpower because he's already too excited to win and impress you. Thinking that you will be impressed by him when he wins that race, the thought that maybe he can become friends with you... Keep running, Bart!
But as the race progresses, he can feel himself losing control. If he keeps focusing on running fast, he'll lose control... That's why he slowed down. Risking the risk of losing the race, he slows down just to avoid revealing his powers.
And, yes... He couldn't make it into the top three, but finished 6th out of 10 racers. Just so no one would know he has super speed.
Yes... after the race was over he turned his scarf to look at you again, but you weren't watching anymore. No, you weren't with the winners either. On the contrary... When he hears footsteps, he immediately turns around and says, uh, my God.. That's you. You are coming towards him.
"..." When he sees you approaching him, he clears his throat nervously and involuntarily avoids eye contact. Not quite sure what to say. "I, w-well... Hi?.." He starts awkwardly and looks at you, his hands behind his back tensely.