A few days ago, I ran out of my front door, my arms filled with library books. It was an epoch day— after more than four long months, our local library was finally open on a Saturday. To my dismay, I saw that I’d forgotten to change my shoes. I ran back, yanked our screen door open and dashed into our hallway. I forgot to hold the screen door open as I waltzed back in—big mistake! Our screen door banged shut, trapping my left foot and pulling me back. I screamed. As my body still tried to move...