Was standing outside in downtown houston at 8:25pm right before sunset on May 4, 2017.First noticed a blue-green light in the sky. Small about the size of a pin point. I thought it was a commercial plan but then it moved fast and then just stopped in the sky. I saw the other end of it and it was fire orange like some type of vent. It at times moved in the direction the vent was pointing. Oposite of what normal craft do. This object moved so smoothly across the sky at fast speeds, slowing down, stopping, changing direction and angle effortlessly. It was taller from top to bottom than it was wide, no wings. The best was to describe is it was like a fly just smoothly making all the changes in flight pattern. I saw a commercial air craft in between me and it and could judge distances from sizes of plane and it. Hair stood up on my neck and I was very scared for the first min when I realized this is not normal and nothing I have ever seen before. And then a peaceful calm came over me and I just took in what I was seeing for next 30 sec. I did not have my phone on me and did not want to leave to go get it. For a second, I looked next to me to see if anyone else saw I looked back and it was completely gone except for some shiny particles specs of light that disappeared also in a second. Amazing....!!!!!!!