A oval object that seemed similar to liquid mercury. It was of mirror resemblance as it reflected the clouds it was next too. It could have also been transparent but looked mirroring. I was walking near a grocery store when I looked up and saw it. When I had, the craft nearly reacted to me seeing it. Similar to someone being surprised and gasping. Though no sound was made it seemed like I surprised it and it backed into the cloud it was next to. Came and peaked out again to see if I was still watching. Which I was. As soon as It saw me again in slightly moved backwards and then suddenly with super sonic speeds was gone into the sky within a second.