Twitter is reportedly testing an ‘undo send’ timer for tweets: All you need to know

The 'Undo Send' feature will give users the ability to pull back the tweet for a few seconds after they hit 'post'.

from http://www.firstpost.com/tech/news-analysis/twitter-is-reportedly-testing-an-undo-send-timer-for-tweets-all-you-need-to-know-9380821.html