I'd already thought of saying that it rolled over several slugs on the way down and their mucous secretions protected it from the ravages of the Great Briny, but I thought it seemed a bit far-fetched. I'll just have to go back to the one about the giant spider that spins a web to the moon.
I'm going out to get absolutely ****ered tonight. No messing about with social drinking today, just gunning for it