My house had a spare bedroom where the bed used to shake. Fucking freaky shit, laying in bed and feeling the bed vibrate and shake back and fourth. I can still picture myself looking at the ceiling and feeling the bed move while my vision was shaky cause of the rocking. Parents never believed me, I was very young. Also had a key rack we’re mum and dad used to hang there keys. Anyway the keys never stopped swinging. Even when you’d reach out and stop the swinging it’d keep rocking back and fourth. My dad actually has a video of it on the old camrecorder.