Friends Don't Let Friends Send Drunken Emails

Gmail Labs is adding a new feature to stop you from sending email you'll later regret.

What it does it after you hit the send button... it checks to confirm you actually wish to send this email. In the easiest way it knows how... to ask you MATH problems! Simple math problems that is...

Thus if you're in an altered state of mind... Intoxicated... Hysterical... Emotional... etc... It will either prevent you from sending it by the sheer inability to answer said math problems... or at least it will give you time to clear your head enough to be Sure you want to send it.

Apparently right now it is only going to be enabled for Evenings on weekends. Which is the most likely time you'd need it. But I think you can mess with the advanced settings if need be.