This FREE twitch effect for Adobe After Effects allows you to create very realistic twitches which look almost exactly the same as Video Co-Pilot's Twitch plugin. Included in this pack is 3 variations of a basic screen shake twitch with added motion blur to enhance the visual experience.
With these twitch presets, you can customize the intensity, seed, direction and other variables of the effect. You can also build more effects on top of the twitch to create something unique.
Twitch effects are commonly used in AMVs and music videos, but you can use them for whatever you want. To make sure the twitch fits well in your video, you may need to play around with some of the settings to achieve your desired look.