If you're the bad guy in a movie, you pretty much HAVE to have a good evil laugh.  And now you can see the best of them, all in one place.  It's a montage called the '100 Greatest Maniacal Movie Laughs'.

It's got everything from the Wicked Witch of the West in  'The Wizard of Oz', to Vizzini in 'The Princess Bride', and Jabba the Hutt in 'Return of the Jedi'.

Here it is: