Alas, I didn't have a camera handy to capture the moment, but:
Huckleberry just summoned Great Cthulhu!
He climbed up on my desk, reached waaaay up, grabbed Cthulhu by the foot, and pulled him down.
Now he's playing with him. Toying, even.
Never leave your Great Old Ones where a cat can get ahold of them.
Update: He tried again, and I had a camera handy, but the stack of papers whereon he was standing included a thick tome of slick cover and rather less than letter-size cross-section, and his wicked plan failed amid sliding papers. Let this be a lesson to you: never use An Inquiry into the Nature and Causes of the Wealth of Nations as a stepping-stone for evil.
Update 2: I can haz Great Old One?
Feetnote: From the bottom of Huckleberry's foot to the bottom of Cthulhu's foot is just about 34 inches. Did I mention Momcat looked to be a Maine Coon? And the fuzzballs are still growing.