It’s a well-known fact that, perhaps with the exception of childbirth, paper cuts are the most painful thing in all of the universe (it’s totally true. Science says so.. and stuff). This seems rather absurd given how innocuous paper usually is and how disproportional the pain is to the size of the cut (a nick would be more precise description).
So, exactly how can a sheet of paper transform from an instrument to write on to a full-blown instrument of torture? This video from Scientific American tackles the issue head on.