You know, the ones hanging by artist Michael Snow.  See a better photo here.

Fun Fact: in 1981 the Eaton Centre tied red ribbons around their necks for the holiday season.  Mr. Snow was like, "ahhh no, that compromises the integrity of my work, this distortion is not okay".  

So they fought each other all the way up to the Ontario High Court of Justice, which agreed with the artist, and so Canada's Copyright Act was changed to say you couldn't just alter an artist's work even after you bought and owned it.  Read more about it all here.