Windows, of which PC is clearly intended to be a parody, and corresponding strengths possessed by the Mac OS (such as immunity to circulating viruses and spyware targeted at Microsoft Windows). The target audience of these ads is not devoted PC users but rather, those who are more likely to "swing" towards Apple. Apple realizes that many consumers who choose PCs do so because of their lack of knowledge of the Apple brand. With this campaign, Apple was targeting those users who may not consider Macs when purchasing but may be persuaded to when they view these ads. Each of the ads is about 30 seconds in length and is accompanied by a song called "Having Trouble Sneezing," which was composed by Mark Mothersbaugh. The advertisements are presented below in alphabetical order, not chronological order. North American campaign The following is an alphabetical list of the ads that appeared in the campaign shown in the United States, Canada, Australia and New Zealand. Accident—A PC, who is sitting in a wheelchair and wearing casts on his arms, explains that he fell off his desk when someone tripped over his power cord, thus prompting Mac to point out that the MacBook's and MacBook Pro's magnetic power cord prevents such an occurrence. The Macbook pictured at the end demonstrates a harmless cord disconnection. Angel/Devil—Mac gives PC an iPhoto book to view. Suddenly, angel and devil versions of PC appear behind him. The angel encourages PC to compliment Mac, while the devil prods PC to destroy the book. In the end, PC says the book is good and then turns around, feeling the air where the angel and devil versions of himself were. Bake Sale—When Mac questions PC regarding a bake sale he has set up, PC replies that he is trying to raise money by himself in order to fix Vista's problems. Mac decides to contribute by buying a cupcake, but as soon as he takes a bite, PC asks him to pay ten million dollars for it. Bean Counter—PC is trying to balance his budget, admitting that Vista's problems are frustrating PC users and it's time to take drastic action: spending almost all of the money on advertising. When Mac asks PC if he thinks the small amount of money left will fix Vista, PC reallocates all of it to advertising. This ad coincided with the introduction of Microsoft's "I'm a PC"