Plausible excuses become more rare the older you become.
Teachers snap photos of your note in kindergarten when it reads, "The dawg ayt my homwerk." They send it to family and friends because it's cute. They may even laugh a little. Perhaps a more demanding teacher would dock you a few points and tell you to make sure to finish everything tomorrow.
Fast forward twenty years and try saying, "The monster ate my desk," when you didn't finish that high profile project. You'll be lucky if all you get is a raised eyebrow.
Guess that means it's time to stop making excuses and really get to work—and that goes for you too, kindergarteners.