The boy thought they had finally caught Aiden, he thought the kick was gonna hit him. The kick had gotten so close to him, and it doesn't seem like he was gonna dodge it...maybe he couldn't dodge it.
But the thing was, Aiden was just passing time, he decided to stand there until the kick gets very close to him, and that's when he'll run out of that place. And that's what he did, by the time the kick had gotten so close to his face, it had become so slow...and he ran out of that place.
The boy's leg just swung past with speed, it didn't hit anyone, Aiden wasn't there anymore. But he wasn't standing at the boy's side or anything, he was standing some meters away from him...he wanted to do something, he wanted to give him a serious punch in the stomach.