Someone lives with a roommate and he or she has a habit of brushing his or her teeth when he or she sleeps

(1)Someone lives with a roommate and he has a habit of brushing his teeth when he sleeps
(2)Oo 20150419 1757 inquiry 4235 comment 33
(3)He argued with his roommate every time. At first, he was just sorry, sorry, but his roommate kept saying he was so uncomfortable. So he bought a mouthpiece and slept with it after seeing that he wouldn’t grind his teeth if he wore it. I told my roommate that he won’t hear the sound of his teeth from today, so you should sleep tight. But while I was sleeping that day, I woke up because I felt my roommate shaking and waking me up, and he was staring blankly from above with the light on
(4)I asked my roommate why he was doing this, and he said
(5)He woke up because he heard a tooth grinding sound while sleeping. This time, he sounds louder than usual and feels like he’s losing patience in himself. Oh, I should just kill him That’s what I thought
(6)I only thought of that, so I tried to find a knife and put it in my mouth, but the room was so dark that I turned on the light and turned on the fire to find it
(7)The sound of the moment just stopped
(8)Originally, when this person was grinding his teeth, he kept grinding his teeth whether he turned on the light or not, but as soon as he turned on the light, the sound stopped, and I went up close and found that he was sleeping silently with a mouthpiece on
(9)My roommate said that if he had found the knife without the light on, he would have really killed it at that time