It looks like this Halloween is going to be very zombie-filled in Toronto. On Sunday, we had Toronto's Annual Zombie Walk. And this Sunday, October 29th, at the Harbourfront Community Centre, a group of some 200 Torontonians will be setting the Guiness World Record for the Largest Performance of "Thriller" - in full zombie ensemble. And they want you to participate. Here's the rundown: Everyone welcome! We'll teach you the dance! Sunday, October 29,......