So last night it was very late and dark and my mom decided to leave a basket at the top of the stairs. I think you can see where this is going from the title. So going down stairs was very fast. And getting up the only thing that I could think about is what just happened in terms of energy. The first thought that I had was how much potential energy I had at the top of the stairs. The next was how much transferred into kinetic energy from falling down the stairs. Then I thought about the mid way point where I had kinetic energy, potential energy and a little rotational energy. I found this funny because physics changes the way you think, you can be sitting on your butt at the bottom of the stairs and still be thinking about how it relates to physics and then realize you have an EM exam on Friday!