My experience with Them, is that they are multidimensional. that is why so many say that you need to meditate on it, etc. I have always felt I was a contactee, but never had conscious remembrance of actually seeing Them, so I always doubted it. I while back, I started meditating in my lucid dreams which (keeping a loooong story short) would bring me into the OBE, or astral states. There I asked for contact and conscious remembrance of the experience. I had done this on 3 different nights. I was visited, with partial conscious remembrance on 3 different nights with each visitation occurring exactly 23 days after the 3 nights of asking for contact.

That proved it for myself, but off course this type of experience is does not prove it to anyone else. But, that is the nature of these ETs we are dealing with.