Why is my roommate doing this?

Okay so basically my roommate sometimes wakes up sort of in a panic! in the middle of the night. She sits straight up freaking out a little for a few seconds and then lays back down. I asked her about it and she had no idea that it happened. She did suffer from a TBI back in 2014 so could it be stemming from that?

?2018-04-19T02:00:19Z

Nightmare.

?2018-04-18T18:57:45Z

Lots of people have bad dreams, night terrors, etc. Perfectly natural. They may disturb you occasionally, but they're not dangerous. Wear earplugs.