Today is Friday the 13th :)
Which reminded me of http://www.youtube.com/watch?v=Zd0hi6zw6to (ulta walking scene from Exorcist), the scariest, or in fact the only scary scene from any horror movies I have seen so far ...
Watch it at your own risk ... :) - well, on youtube it does not look that scary, but while watching the movie, with the one having had (more than) enough tense moments before this scene already, and when one had already, many times in that short period of time, reached the verge of getting scared ... :) - it looked scary ... :) - believe me ...