Freaked me out..
..when my printer suddenly sprung to life, printing a little note to say it had updated itself.
My Deskjet printer often sulks, and likes to keep itself offline most of the time, so it was extra surprising to see it suddenly announce its proactive patching.
But now it's announced itself to me as being alive itself (with a handy reference to its webserver, I felt compelled to at least have a little poke around. And.. 6 tcp ports open and listening and waiting for abuse :-)