I know I’ve sent my fair share of emails to the wrong people, and according to this Gmail Blog, it only takes a few seconds to realize the mistake, which I believe. Thanks to the new Google Labs Undo Semd, you may no longer need to feel like an idiot. Well because you sent an email to the wrong person or had the wrong info or something. Now you have about 5 seconds to realize your mistake and undo sending it. Once it is sent, you cannot remove it from the other person’s inbox. Now the only thing that would make this compelte is the ability to up that timer to about 10 seconds.