Whether you need an evil laugh to accentuate your Halloween costume or just to impress your friends, perfecting your very own evil laugh can be easily done. This guide will walk you through how to do an evil laugh step-by-step.

All true villains have an evil laugh. If you are trying to imitate your favorite villain on Halloween, you will definitely need to work on your own evil laugh. Your evil laugh might just be the key to your having the best costume at any Halloween party.

1. Watch your favorite movie and television villains and listen carefully to their evil laughs. A recent popular example would be Heath Ledger as the Joker in The Dark Knight.
2. Think about whether your evil laugh should be subtle or exaggerated, loud or soft, maniacal or just a touch of crazy. Also think about whether you should have a high or low-pitched evil laugh. A low-pitched evil laugh with an echo effect can be especially effective, as can a high-pitched, almost manic sound, provided you have the right facial expression and arm gestures.http://www.wikihow.com/Do-an-Evil-Laugh
3. Make sure that the type of evil laugh you choose matches your personality, otherwise it will not be convincing.

Once you know the basics about how you want your evil laugh to be, you need to practice.

1. Stand in front of a mirror and watch yourself as you perform your evil laugh.
2. Try laughing from your throat to see if that changes the laugh.
3. Make sure to practice with different facial expressions and arm gestures. Changing your facial expression can entirely change the sound of your evil laugh, and the appropriate arm gestures often really sell the evilness.

In order to know if your evil laugh is really and truly evil, you should try it out in front of your friends.

1. Don't hold back. Show them all of your different evil variations and let them give you suggestions and pointers on how to make your evil laugh even more evil.