The craft was Triangular,one story thick,in the middle was a half sphere ,and it made a deep humming sound.

Myself and my mother were out late one night looking at the stars through my telescope.When we heard a deep humming sound coming from in back of us and we looked up and saw the craft.It was huge triangular in shape and it looked as thick as a one story building and in the middle there a half sphere which was glowing pink.We stared up at for I don't know how long ,but then it moved away over Andrews Air Force Base.After the craft left my left ankle hurt and when I looked down at it it looked like a dough  nut and it hurt for a week.There is still a little scar there.Is really to bad my mother can help confirm my story because she is as current mentally unstable.But I know what I saw and there were probily others who saw it too.
Date is approximate.  PD