Ok, this is isn't search related, but it's too much fun not to cover. Gmail has released another Labs feature. This one is called Mail Goggles and it's intended to help you avoid sending those late night or weekend emails that you'll regret later.
When the feature is enabled, you have to answer simple math problems before an email will send during those most vulnerable emails-I-will-later-regret times.
Of course, if you're having a perfectly sane moment but math isn't your strong suit, you'll need to break out your trusty calculator (or enter that math problem into Google search).
But at least now there's technology that has your back in those weak moments.