I feel terrible! A year or so ago I saw a black dot in my sink and went to wash it away when I realised it was the teeniest baby snail.
I rescued it and I've taken care of it until the weather gets a little bit warmer and he/ she gets bigger.
I was thinking of releasing it and I've just cleaned out it's little home. I noticed it wasn't in there so had a look around and spotted it in the kitchen wall. I've just tried to move it and heard a little crack noise 
now I've cracked the shell slightly after all this time. I feel awful!! It's still on the wall, I'm hoping to somehow get it back into its home and really really hoping it heals.
Not much point to this post except to share my extreme guilt