I forgot to be really scared of the Angels in that two-parter, after the terror of Blink, and now I think I'll never watch it in the dark again.

That little bit, when Amy's walking through the angels, and the monitor image of the Angel is flashing over and over, and then SHE's in the monitor image moving creepily. I died in fright, revived, and then watched it again. Loved it!