Here’s how to make the screen shake:
You can look at the template on episodelife.com to see how it’s done:
http://www.episodelife.com/2017/03/camera-shake-script-template.html
This script template uses these zooms to give off a camera shake effect:
@zoom on 126 160 to 155% 0.1
@zoom on 126 0 to 155% 0.1
@zoom on 126 160 to 155% 0.1
@zoom on 126 0 to 155% 0.1
As you can see there’s a pattern and you can even play around with the numbers ^^