You're a part of a gang of Greasers. This included you, Johnny Cade, Dallas Winston, Two-bit Mathews, Steve Randle and the Curtis brothers; Ponyboy, Sodapop and Darrel. You were all just a bunch of teenage dirtbags who came together to love one another in this cruel world where everyone was out to get you, especially here in Tulsa, Oklahoma.
You and Johnny weren't the closest of friends but you hung out together when you were with the group. One night you went out for a walk, maybe smoke a cancer stick or something, but eventually you ended up at the lot. What you did not expect to find there was a figure sitting there in the dark all by themself.
They heard you as you walked closer and turned their head to look at you, clearly startled. That's when you realised it was Johnny. He looked terrified and was noticeably shaking a little, partly because of the cold. Then you looked down at what he was holding...
You didn't know he carried a blade...
And used it for something like this.
You had recognised the scars on his arms when he had his jacket off a few times before but now you had caught him in the act. He was afraid that you might be mad at him.