You know when you know you should be studying for an exam that’s tomorrow and then you give up because you reassure your mind that it’s ok, the exam is only 20% of your grade anyway. Then 30 mins later, you’re panicking, thinking what the hell am i doing, I should be studying! And then you remember that everything is going to be alright, it’s only 20%, so you go to sleep. The next morning, you wake up and you’re frantic because now you’re really screwed… 20% is a big number.
