You might know this from “Half-Life VR but the AI is Self-Aware”, or maybe just from playing gmod. I’ll let the video speak for itself.
It also has a variety of chat commands, for setting the effect size, collision, material, transparency, duration, sound id, etc.
Bonus clip :
This is awesome! I don’t have any criticism but good job
Haha! This is amazing! I have absolutely no criticism! What are you going to do with this? 
Great job! I really like that the face changes.
It’s certainly different, but I absolutely love it!
Ah yes, I remember this in my 1,600+ hours in GMod hah, I love that add-on.
oops sorry for the bump