Quite a few years ago, we had an air show at Bangor IAP (KBGR). One of the aircraft on static display was a C-5, which a lot of us had never seen, so when it called the tower, we all ran to a small hill overlooking the runway.
We saw a hi-tailed aircraft on short final, and were disappointed by its "Not so big" size, and many made comments to that effect. Then one guy said, "Here comes its mother."
What we saw first was, of course a C-141; not all that impressive.
The C-5 was another story altogether, and we were duly rewarded for rushing out to see it.
Over the years, C-5s from Stewart AFB would come here and do transitions. They would often go right over my house at about 3000ft, and they look for all the world as if they are moving s-l-o-w-l-y through the air as if floating rather than flying. They also whine a lot.
They're gone now, but occasionally one will "drop by" and "float" over me.