Sorry about the quality of the image, but it was the best I could do. If you can't read it without your eyes buggling out, it says: Wishes - When you wish upon a star, your dreams can come true. Unless it's really a meteor hurtling to the Earth which will destroy all life. Then you're pretty much hosed, no matter what you wish for. Unless it's death by meteor.
Yeah, yeah. Meteors burn up in the atmosphere, and it's meteorites that crash, but let's not nit pick. And don't even get me started on comets. Seriously. LOL
(Available for purchase - along with other fun demotivational posters - at Despair.com.)