To put your mind at ease: if it was very serious, ie. he wanted to take some sort of disciplinary action, he would've spoken to you today as it would be a high priority. If I were you, I would keep quiet and get on with things as if nothing has happened. Chances are, he will forget as what happened is no big deal. Dont be surprised though if you get all the nasty jobs for a few weeks and watch your back as supervisors/managers will be watching your every move. The minute you make the wrong move, expect something to be made of it. I expect this to continue for a few weeks, after which, your incident will be old news.