This article was originally published by The Conversation. You can read it here.

Consider, for a moment, the paper cut. It happens suddenly and entirely unexpectedly, usually just as you are finally getting somewhere on that task you had been putting off.

Recall your sense of relief to finish that thank-you note to your aunt for the lovely sweater she sent you three months prior when, at the crucial moment, your hands failed you in their familiar task and the paper's edge slid past its restraints into the flesh.

Then pain – sharp, pure pain that bends your consciousness to the Only. Thing. That. Matters. Right. Now. There is sometimes a moment, between awareness and pain, when you bargain with fate, hoping that what just happened didn't. But the hand is gone and the blood needs tending.