Long Exposure

I was shooting with my buddy in our hometown the whole day. I was super excited, especially because I couldn't shoot with him due to health issues. When we were done shooting, we sat down in a local restaurant and grabbed something to eat. I saw the awesome sky during the blue hour from the restaurant and grabbed my gear, chasing the time. My buddy didn't want to come with me, he said that he was too tired. I gotta say he was pretty envious of me after seeing the shots I got. I think this was exposed about 3 minutes with an aperture of 16 or so and an ND400.