New feature of Gmail: Undo Send

I just found out that Gmail have introduce a new feature called "Undo Send". As the name implied, this function will undo the sending process and could probably save you from those "Oh Shit", "Oh My God", "Oh Fxck" moments. "Undo Send" puts a five seconds (If I have time correctly) hold on all outgoing messages. If you addressed an e-mail to the wrong person, let slip with an embarrassing typo or simply said something you really, really shouldn't have, Undo Send can be a lifesaver. Or, more accurately, a job-saver..... Make sure you make good use of the 5 seconds :P To enable the "Undo Send", you go to Settings and then Labs tabs and enabled it.

After enabled it, every time you send an email, you will see an Undo link at the confirmation message that appears at top of the your inbox.

If you do nothing then the email will send out...

Click on the undo, undoing the sending process

Once undone, will bring you back to the compose page

Do take note this "Undo Send" cannot pull back email that has been sent out and you have 5 seconds grace period to save you ass :P