This is a picture of a chalk drawing. The person, I suspect, is real. Click here for more reality transcended (thanks to my Aunt & Uncle for sending me this.)
And here's a link I found on my own: colors and designs floating in mid-air Not sure I'd want to live in these rooms.
Here's one on a grander scale.
Beware! Here's an optical illusion carried beyond the limits of taste: eye-catching ad for a plumber
And on four completely different notes: a barbershop quartet video - showing four slugs. It's entitled "Sincere Slugs".