For quietly scary fun, there's this mashup I created a couple of years ago, combining the final two movements of Chopin's Piano Sonata No.2. It features the most famous funeral march ever with the terrifying ghostly echoes of the whirlwind finale:
So, that's to set the mood.
Then there are these two videos which I regret to say I didn't create. But they're frightening visual companions to Schoenberg's Pierrot lunaire. First...
...and it's newer, maybe even freakier, companion [UPDATE: It's gone now, and I don't remember what it was!]:
So, no, I didn't make those, but they did inspire me to make this, which is pretty unsettling: (Check out the look on the sun's face.)
Now, let's pause for an ad from J. Peterman.
Here's my own little take on Pierrot lunaire, combined with some Stravinsky. Creepy clown!
And if you like Stravinsky jabbing at you unexpectedly, you might give this a try. [Click on image below.]
Finally, in light of the surprising intersection of wintry snow cover and October we're having here in the Northeast, you can find all manner of creepiness in these various versions of Schubert's "Der Leiermann," from his song-cycle Winterreise. (None of these are mine: this is just a little playlist I put together for Twitter-based reasons a couple of days ago.) I'll embed one here, but you can find the others by following the link just above:
Enjoy the day!