Somewhere between 2 & 3 years old.

I would be sitting in the floor, playing in front of the television. When, suddenly, I would be defying gravity and "floating" through the room, lol.

This memory was very confusing until I mentioned it to my father many years later. He told me that it was just him picking me up and carrying me across the room to sit in his lap. He said it had just part of his morning routine.

tl;dr - aliens?; not aliens.