I was born in 68! My family accused me of being an alien. :)
There are so many stories of huge craft! That one seen over Alaska by Japan Airlines comes to mind. The one in Stephenville, TX... I can only imagine how disorienting these things are when you see them hovering, silently. We, the human brain, just has a hardwired idea of physics, and so when you see something that big effortlessly being, what do you do with that? And then they can depart so quickly you don't see vectors, you might think it cloaked. Maybe it did cloak. Maybe it uses other dimensions. Or maybe they move so fast our brains just can't interpret the data. Maybe all three explanaions are plausible.
Maybe there is something we don't even know about that explains it!
I so hope that we all know a lot more before too long.