Buried in the Past

"Dirt. The sound of a shovel moving through the ground, of soil dancing across the surface of rough-hewn wood. Ever-increasing darkness, slowly crescendoing until the light was gone." In Lazarus Rising, Dean drags himself out of that coffin with frightening know-how and efficiency. My explanation for how he knew what he was doing. (Inspired by a prompt from SoooMyNamesRebecca)