Let’s imagine that you are in a new office. You see your new boss and he asks you for ideas to make the new employees feel welcome. If you do not send it in time, the monkey is on your back.
Take an extension as an example of the above:
You get an initial draft ready and send it the same day, the boss receives it but doesn’t find the time to go through the draft as it is the closing month. As the boss did not reply in time, the monkey is now on his back.