I have night terrors. Many times I just wake up screaming for no reason. Then go back to sleep. For those who don't know, night terrors are when the fight-or-flight response is randomly activated during sleep. No nightmares are involved.
One time when my sister and I shared a bedroom (late teens, I think?), we had beds on the opposite side of the room. I woke up and cleared the entire room in one bound and landed in her bed screaming, huddled behind her. She tried to calm me down, but my mom came in and growled, "Augh, shut up!" Hahaha. My sister scolded my mom. Eventually I stopped screaming and crawled back into bed, and went back to sleep -- I probably fall asleep easier after such events than the people I wake up by screaming.
I've only had a couple in the past few years, luckily. The one time I remember most recently I woke up my SO and he comforted me a bit and then I went back to sleep. No leaping out of bed that time.
I also probably have sleep apnea, but it's mild enough that it doesn't affect me if I'm not sleeping on my back.
I occasionally have sleep paralysis, which isn't listed on the poll, which is when your mind wakes up but your body hasn't turned off the paralytic mechanisms that keep you from acting out your dreams. That's pretty scary. *lol*
Aaaand, I also have some intermittent insomnia. Oh, and I definitely grind my teeth.