What about my grandma was sick, the dog ate my homework (and my computer), I had chlorine in my left pupil, my essay was kidnapped by alien?
I agree with Ouisch, live and learn.
The good thing with making a mistake is what you feel so bad when you do that most people will do their best to make sure they never feel that way again.
Don't take this personally, I was only kidding

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I used to procrastinate all the time. So there's hope, you can change!