All cats eventually learn what some things mean. Some are smarter than others, of course, and will understand more than most. But most of them will know when you're getting up to get them food, they'll understand the sound of a wet food can opening... they'll learn. Some of them though, shock us with their abilities, and the cat of glumshoe on tumblr, did exactly that.
It seems that this little semi omnicient god-tier goblin knows exactly when her human is about to get ice cream. It's only like that with ice cream. And it seems that all it takes are some "ice cream thoughts" from her human for her to come running.