The punctuation mark, of course, is best used when followed by a list of one or more specific items. And the other kind of colon could be described similarly, if we want to be cheeky about it. Each kind of colon is a noun. What about a semi-colon, though? How does one partially extract a colon? Well, by inserting a comma, of course.
English is weird, period. Is my period in the right place? I'm not sure how the period ends. With a pregnant pause, perhaps?
Does this mean two periods get together to make a colon? Can we call that the grammar version of a colonoscopy? Comma over here, let's see what we can make out of this...