I once heard someone say that Hell definitely has to be paved with hidden LEGO bricks to ensure eternal foot pain in the great inferno below. For a brief moment, I believed them. It’s hard to believe that something so small and colorful could be so painful. Many people (especially parents of young and messy children) agree that few things are more painful than an errant LEGO brick in the dead of night.

But just why exactly do we find these seemingly innocent plastic bricks to be so unbelievably painful? Well, the American Chemical Society’s Youtube channel is here to shed some science light on the subject. In an informative and educational piece, they explain the how and why of LEGO pain.