It's always easy when amateurs, like me, mess up using a powerful image app like Photoshop. Hey, it's a given. But, what's downright riotous is when paid, talented professionals do it on a public canvas like posters, ads, and what-not. I hereby recommend, for your entertainment pleasure, the PhotoshopDisasters blog. If you've ever dabbled at misaligning pixels on an image, you won't be disappointed.