Very recently, LACMA invited Mortilla to play for nine hours as "an exhibit in and of itself, accompanying four silent films, with one being repeated. It's thought that such a feat has never been documented for a world's record.
The Guinness World's Record will review and register the performance. More info about the event can be found here: http://www.lacma.org/event/michael-mortilla
If the Guinness folks don't approve the application, Mortilla will be taking short breaks of 5-7 minutes each. If they do approve the application, he will play through the breaks to set a new world's record for improvisation and for accompanying 9 hours of silent films in a single sitting. Lulu will be a small part of this historic event.