Gotham City and the Sky Mirror

Anish Kapoor's wonderful Sky Mirror has just been installed at the Rockefeller Center in Manhattan.

It was previously displayed outside the Playhouse Theatre in Nottingham. According to the BBC

[i]t has previously been placed in Nottingham, where it caused concern over whether it could set people or birds alight.

Now I know Nottingham has a bad reputation but are there really that many incomers from Gotham?