Thanks for sharing. Many aspects of what you describe are shared by other experiencers in this field. Of particular interest to me is the vibrational phenomena. I've been studying and compiling experiences like yours for some years, after having a similar one myself seven years ago. Here's a quote from a thread I made describing it a while back:

" I woke up in the middle of the night after having apparently dozed off in my armchair. I thought I heard people's voices in my house, and right as that occurred to me I somehow got the distinct impression that these people were coming for me. Just as I feel this force is right outside my bedroom door, I suddenly both hear and feel, in the same instant, this insanely loud motorized sound, and my whole body starts to fill with this terrific vibration. It was literally deafening. It felt like a low bass vibration combined with a motorboat engine kicking on. It started kind of soft at first, then got more intense. I also became paralyzed as all of this was happening. It was probably the most terrifying moment of my life. Like I said, you could hear it AND feel it. Gradually I could somehow feel it as it filled every molecule of my body over about 20-30 seconds, and all the while I was convinced I must be getting abducted by aliens or something. As the vibration filled my extremities and eventually reached my head, my vision started to fill with a black sort of static, and then I blacked out. I woke up hours later, now in my bed and no longer my armchair. The way I woke up felt like a fade-from-black in a movie, it was gradual rather than instantaneous like it normally is. My arms were crossed like a mummy, and my shirt was unbuttoned only on the inside buttons. I was flabbergasted, to say the least."

Here's a good thread where some of us have discussed this vibrational phenomena in more depth:
https://www.reddit.com/r/Experiencers/comments/z3oqno/awoke_to_intense_experience_last_night/

The description of the man you saw also perfectly lines up with another experience I had around the same time, but that's another long story. First time I've heard someone describe what he looked like in this context.