My cousin used to have a poster that had the same saying as is on rikibeth's response. With bong-like curls of smoke behind it, in shades of tan and white. Very psychadelic, yet muted. I always loved that poster, even though I was 12 and really didn't know what the drug references were to.

Of course, he also gave me a mirror that had the legend, "Homework causes Brain Damage" for my graduation...