The one nightmare that has stuck with me the longest is where i was in the woods, and i encountered a worm with blades on either end of it. It jumped on my hand and curled around my finger, slicing it off with the blades, then I woke up.

I've had other nightmares but they're a lot more mundane. Losing control of my car and careening downhill, someone hurting my cat, and not being able to find my dog are three I've had a bunch.

edit: I also have the "suddenly realizing you're naked" dream, but credit to my dream self the last time I had it I distinctly remember immediately playing it off like I meant to be naked the whole time. Need that confidence in my waking life.