"Personally, I don’t think this feature would be of any benefit with a mere 5 second response time. If I’ve fired off an angry e-mail, or said something I regret it typically takes me longer than 5 seconds to realize it, by then it’d be too late. But for some users this might save you from a drunken profession of love, or a snide remark to a coworker."Shout out to the ones who send "that email" this here is for Y-O-U! Make it quick cuz 5 seconds isn't too spiffy!
I got good news and bad news... The good news: Google has new feature where you can Unsend an email!!!!! The bad news: ...you only got 5 pretty seconds.