To the original poster, were there any teachers around? I would of have a quiet discreet word with them, as a parent you have a right to enquire about strange behaviour in your childs school setting. This to me seems absolutely innapropriate, especially the drinking alcohol. I used to go to goose green 20 years ago when it was called Grove Vale, im 30 now and I know there have been many changes in the school but things like this although may seem harmless, if not reported could lead on to something more sinister. Im suprised he wasnt approached by any of the school staff!