slowpoke aswell, tho usually i manage to wake up during nightmares.
i recommend to bend neck sideways while you are experiencing nightmater while sleeping, ofcourse if you have more or less cautiouness at the moment, thats the only part of body you can move during sleep period, i'm sure hanzo as biologist can explain why and what.

but yeah that helps. + understanding that you are in a dream breaks everything and whole scene stops and changes to another.

usually when i sleep i loose connections between scenes, even tho i remember it at morning.

quite crazy shit tbh.

try to check what you have watched/played recently. brain barely produce stuff you didn't seen, most times all dreams or nightmares is recycle trash

idk how normal and appliable this to you, since, let's be honest, my mind surely have some issues