More on the story here with a great "ho hum, I just smashed that" video of the incident happening, which makes the artist look like a toddler waiting to be told off, (as seen in above picture from the BBC) and more quotes from the artist here. It reminded me a lot of a chap we had in our art gallery once...
What really caught my eye was this amazing snippet of statement from the museum:
"As an art museum dedicated to celebrating modern and contemporary artists from within our community and around the world, we have the highest respect for freedom of expression. But this destructive act is vandalism and disrespectful to another artist and his work, to Pérez Art Museum Miami, and to our community."
That quote came from here and is a masterly example of politely dissing someone in posh language.
Mr Ai joined in a similar way by explaining that when he was photographed smashing vases, it was "a little different".
"The work I work on [does] not belong to a museum or other people's property. I never tried to destroy a museum piece - those vases belong to me. He can drop whatever he likes to drop, but not other people's property."