What was the scariest animated TV series you had seen whether you saw it when you were little or when you got older.
When I was little, I used to be scared of the "Beetlejuice" cartoon theme song because of the weird and scary imagery that kept popping up. Not to mention, the theme song really scared me at the time. But now, I actually found the theme song to be pretty cool!
I never really watched Courage the Cowardly Dog when I was little since I didn't really care for it at the time, but a few years back, I managed to watch an episode of Courage the Cowardly Dog on YouTube called "Freaky Fred" and the music that was playing throughout that episode really freaked me out!