Yeah, it looked like a largr cylinder going end over end, causing the light fluctuation. But it was with some cheesy high power binocs so I had to guess it was not very high if I could see the shape. Might have fallen sometime after, from someone’s launch.
I can barely see the rings of Saturn with my 16x binos (the shaking doesn’t help). The angular diameter of the ISS is only slightly larger than that, when about 200 miles directly overhead. Even if what you saw was much lower, say 100 miles, it would have to have been very large to see its shape with binoculars. Still possible, however.