It very much depends on the kind of nightmare, or if I'm in a nightmare cycle.
New ones, I tend to wake up silent. Don't move, keep breathing, keep lids closed, "look" asleep. Other times I wake up already moving.,. Halfway across the room with a lamp I've ripped out of the wall in my hands. Other times I wake up soaked in sweat. f*ck. Fine. Drag the sheet off the bed, go stand in the shower. Go back to bed. Other times I wake up needing the whole life affirming, f*ck me now, thing in full swing. Other times, especially if it's been a fairly long nightmare cycle, it's roll my eyes, turn over and go back to sleep determined to finish the sucker. Other times I'm swearing, or bolt upright, or, or, or.
Very much depends.
LOL...ETA... I was staying at my parents a bit ago, and apparently I was writhing and moaning and looked to be in so much pain my mom popped a couple morphine pills in my mouth. It was just a bad dream, but I feel pain in my dreams, so... Shrug. I do have chronic pain, am used to waking up hurting. That morning I woke up pain free! Such a lovely day out! LOL. Pity that's not a solution I can use regularly!