Boffins in Finland seem to think that those of us who get a bit irate when they've had a few too many might have an "overactive gene" that's responsible. 'The MAOA gene produces an enzyme that breaks down brain chemicals involved with mood,' apparently. When alcohol is combined with the enzyme, it all goes a bit pear-shaped and Bad Things Start To Happen. It's not all bad news; it seems the effect diminishes with age - so there's hope for Amy Winehouse yet. The full article is here.