I managed to take a much better video.
Also I'm not sure if you can see from this video but this guy is attached inside of the snail's shell. Its created its own shell on top of the snail's shell or it's broken in and cracked and opened the snail's shell to make itself a home.
I could not find a photo on chuck's addiction that looked like it so I'm stumped.
It dosn't *seem* to bother the snail but I could be wrong.
Anyway, here's a link to the better video:
http://youtu.be/R47t211KVmE