There's a Monster!
We could hear the periodic roaring of a balloon working its way upright, but couldn't see it. One was airborne and visible, but too far away for the volume of noise . . . then this creature appeared through the trees at the top of our hill!
But it's only the Fly Navy balloon; and again I say, "Who would want to?" :-)
Note the deer, nonchalently grazing . . .