They turn up when you’re least expecting them. They won’t leave you alone. Sometimes you can’t get away, even for a moment just to clear your head. They might even invade your dreams at night. What are these terrifying intrusions? What else: Internet memes. Currently all the rage, they seem to be everywhere in our virtual online world. Maybe you’ve seen them. Maybe you’re one of the lucky ones that doesn’t know what I’m talking about. If so, thank your lucky stars, because they are quickly becoming an indelible part of our shared online existence.