If only people had the ability to read minds, then they'd have been able to figure out the secret behind Hiro's accurate freekicks.
The reason why Hiro could score those freekicks successively in a row was because of his skill Fireball Shot.
His skill Fireball Shot could enhance some of his stats temporarily while taking freekicks and long range shots for three times.
However all along although he had been relying on his skill to score these freekicks, he hadn't been overtly relying solely on the skill as well. Afterall his skill wasn't actually complete.
Infact Hiro could only display a fraction of it's original might because of one particular reason- there were simply no living people standing infront of him who acted as the wall.
To display the full potential of the skill, living people were needed. However right now what stood infront of him, acting as a wall wasn't people but mannequins.