I won't even post any of the details.
Just click through to the Telegraph and enjoy (or be horrified, disgusted, faint, et al.)

http://www.telegraph.co.uk/news/uknews/5748855/Man-cuts-off-own-penis-during-drunk-DIY.html

Do it yourselfers, remember, its hard enough to do it yourself, it gets even more interesting when you add intoxication to the equation!