Looks like a few people are having fun with Microsoft's new Apple-combating ad campaign! Some good-natured scamp has created a website based on the phrase, "And I'm a PC"; just click the page to refresh and you get a new silly message like the one pictured, each finished off with the phrase, "And I'm a PC."
Take the cue from this joke and just start saying it after every declarative statement you hear, like: "I can't wait for Taco Day!. . .And I'm a PC."