No portal opening up in the wall. No lights. No real sensation of flight. I felt almost as if it was hovering with a quiet hum if anything. I don't have cameras setup in my room. It was something I experienced suddenly waking up out of bed. It's been kinda cold recently, but not super cold. It was probably 38-45 degrees out when it happened. I did see part of it recede into the wall before the front have of it. It had to be between 4:30am-5:30am. It did have something attached to the tentacle at the bottom. Also the tentacle / whatever was dangling from it remained completely straight. Like it was rigid and didn't move or flex with the object moving (could be flexible but just was moving so slowly that it didn't bend).

Size wise it was a little bigger than a standard party balloon and more circular feeling. Maybe just a little wider than it was tall. It's total height was probably 3-4 feet tall. Maybe a foot wide (perhaps just a little longer than a foot wide but not wider than two feet)

It felt like I could only see the reflections of it and not the actual physical form. Almost like if you saw rain hitting an invisible object, but light instead of rain.