A photographer snapping photos in the outdoors noticed a spherical shiny object in the sky near a passenger plane. As they were photographing the UFO, they noticed it had a "smooth motion" and eventually it rose and disappeared. Interesting enough, the witness (who submitted photo and testimony to MUFON, case 81809) said all the planes nearby started emitting contrails after the object passed:
I had just gone out to take photos for desktop wallpaper, using a Fujifilm X-T1 and XF16-55mm f2.8 zoom lens. I noticed the object within 30 meters of leaving home and resorted quickly to manual focus and aperture at 55mm (longest focal length) between f5.6 and f8, trying to zone focus.
Could this have been a drone or a balloon? Based on the witness description, the object appeared to move intelligently and was almost interacting with other planes. What do you think of this sighting?