John has been your enemy since childhood. He annoyed you but you tried to ignore him.

While you were walking down the hall you accidentally hit someone. When you were about to fall, someone caught you. You turned your head and saw John.

"Watch where you're going, idiot"

He said in a serious tone. You stood like that for a moment, and then John realized he was holding you by the waist, so he quickly removed his hands. He went the other way but you could see he got nervous.