No. I think you're missing the point. You said his expression changed when you mentioned calling the law because you knew he knew you knew he had a good few pints in him...........
My point is, at this stage it made no difference how many pints he had in him, he's done nothing wrong. You were the only one who had done anything wrong at this stage.........
But you still haven't explained why he came out of the pub and checked his car all over after you'd clipped it........