What's the Scariest cartoon(s) you ever watched?

Personally I find Old Grey Hare somewhat scary. From my childhood
memory, I remember that one time in Disney's Duck Tales, the elderly
Donald Duck 'Scrooge McDuck' was going forward to his future in a
nightmare. Also, in Alvin's Future episode from 'Alvin and the
Chipmunks' Alvin was having incubuses of himself becoming poor,
becoming extremely fat and getting old. Those 3 were the scariest
cartoons I ever watched.


1- Alvin's Future (Alvin and the Chipmunks)
2- Scrooge McDuck's nightmare (Disney's Duck Tales)
3- The Old Grey Hare


Write the cartoon, and if it's a TV series, write the episode if you remember, if not write a brief description of it ;-)