That bl00dy Inception film I reckon. My GF freaked my out last night when she woke from a nightmare which woke me with her thrashing and clawing and sounding like an attacking zombie. Jees!
My worst one used to involve climbing a spiral tower in the middle of the desert, only to find that I was at the bottom again and watching a dolphin thrashing about in the sand, unable to breathe, then somehow immediately watching a tennis match between a giant and a fairy, except they were using sewing needles instead of raquets and were really trying to kill each other with the needles, and I was confused who to root for cos the giant went for brute strength and trying to bludgeon the fairy to death whilst the dairy was really, really weak but really fast and stabby.
Seriously. I used to wake up in a cold sweat.
Apparently she dreamt that she was sat next to a window and someone smashed through the window to grab her.
I think it was the noise she made that was most disturbing. It wasn't like her own voice. Creepy.