Here is what I experienced recently.
I [seemingly but not actually(?)] woke up from sleep in the middle of the night and realized the ribs on the left side of my body were rubbing one another.
It was interesting at first but rather unpleasant. Also the left side of my face was crampy.
I then realized I was being attacked by some entity. It would lift me upwards and beat me against the bed. It also tried to break the wall with me head-on like I was a ram, but an invisible barrier before the wall stopped me from reaching it.
I remember my quilt being lifted to the ceiling violently and dropped down on me several times.
It got unbearable and I broke out of it with some effort.
I fell asleep and had a semi-lucid dream where I was aware I was dreaming but my control was limited (esp. regarding the scenery), but it was rather nice as it was easy to maintain without much focus.
Although the experience wasn't all pleasant, I'm glad to have had it.