Nothing gets you up close and personal with, um, the bare facts of biology like stopping at a red light and putting your foot down into an opossum that someone else has recently inverted. Truly, high school biology class has only lightly prepared you for the stark reality of a spread of day-old intestines all up close and personal. If the red light is a long one, you can also experience the joys of the carrion flies and marvel at the way nothing is wasted in nature. There’s no better way to get right up onto the realities of existence.