There's a You Tube video by someone named sockcutter called "My best apophysis animation yet"  [link] I stumbled upon it a couple of years ago while researching GIMP tutorials and was blown away!! I wondered "What is this Apophysis thing, anyway?"  I wanted to learn.  AND, I wanted to find this sockcutter person on dA, but couldn't.  
Well, recently I noticed a very familiar-looking image here on dA that turned out to be a still from the You Tube animation. The artist is  I've come full circle and finally made the connection between You Tube's sockcutter and dA's ~mynameishalo

This animation is five years old and  is the one that imprinted in my mind. I'm forever attached to it and thank sockcutter aka ~mynameishalo for inspiring me to pursue fractal artwork.  Here's a few of the images from his gallery.