Spherical object, varying heights and speeds, seemingly responsive to our presence.

Three witnesses saw the same thing. Whitish yellow sphere seen shining through densely forested area. Object then climbed to a height above the tree line, and then took on a bouncing, stair stepping-like pattern as it made its way toward the lake, along the tree line. Followed what appeared to be the shoreline at a rapid rate. Object had differing levels of flying heights, abrupt speeds and stops, seemingly aware of our presence. Silent movements. Everything was silent; even the frogs. The object flew toward us from across the lake after pausing, in what seemed like a response to my brother saying, “Hey!” My brother said, “Hey!” a second time after it had paused, and that’s when it abruptly flew toward us from all the way across the lake. We ran inside our cabin (like that would somehow provide safety, we joked afterwards), and the object remained at a height of about 10 feet off the ground. It then seemed to float alongside our cabin and then vanished from view. We can not explain it and have ruled out any reasonable speculation of what it could have been.