I had a HECK of a time figuring out how to make a shockwave effect in Unity.
Not because there is a lack of info out there on Shaders for it, that was easy to find, but particularly, because I use a 2D renderer (which was experimental when I first started using it.) There was shockingly little on how to actually implement a full-screen distortion effect with the 2D renderer.
Well, I'll show you the tricks I used to accomplish this with this video, hope you enjoy!