Your character got a bad knock on the head; happens to the best of us. Although tempting to write the following scenario, DON’T! Your character is punched. They’re unconscious for several minutes before waking up with a headache, maybe a bit out of it/acting silly. A week later (or worse, later that day), they are back to their plucky selves, fighting crime, getting into mischief, what have you.* Unfortunately, if you’re going for a realistic story, that ain’t happening.