I have always wondered what all of these crazy descriptions of angels really look like that people like Isaiah describe. To anybody who has used a psychedelic substance, you know how hard it is to describe entities from an altered state. I have always assumed they were in an altered state when they met these beings and that they were unable to correlate them over to entities in our physical realm. Alternatively, they could just be other beings or even machines from higher beings that we don't understand.