They really are fascinating creatures, the way in which they protect themselves is quite remarkable. It's really the first bullet-proof vest, if you think about it. They don armour that isn't part of their body in order to protect themselves.
I just find these simple creatures to be incredible.
Note: I found him on my trowel in the backyard, took him in the garage for some photos (he was a natural in front of the camera), and then brought him back to right where I found him. I even made a mark so I could return the trowel to the exact same place from which I took it. No snails harmed here; I love them far too much.