UNDO YOUR SEND MAIL

Did you clicked the send button BY MISTAKE[ in the middle of something ]? 
dont worry gmail provides a facility to undo your send mail

the Gmail has the feature,
you have to enable it under
Labs[ go to settings
,click labs,
find the [Undo Send] option, just enable it.]


andWhen you send the message in the top of the page you can see



Just click undo, and your mail wont be send