'Tis the season to be jolly. Especially if 'jolly' entails getting found face-first in the gutter, covered in your own vomit. Yes, the Christmas party season is upon us, and with it comes an increase in the number of people who - although completely reserved the rest of year - suddenly act like Oliver Reed at an open bar. Don't be fooled into thinking a Christmas night out means running into the same type of inebriated folk you would see any weekend of the year. Much like migrating animals, there are some boozehounds who only appear at certain times and in certain conditions. So when youre hitting the town in the next few days, be it for a staff night out or a general Christmas booze up, keep your eyes open for those normally sensible types who are really getting into the spirit of things. You may well spot several of the drunks on this list, maybe you're even one yourself. Just make sure you approach them with caution...