As that Halloween door creeps open to unveil a Pandora’s box of scary surprises, people in California are in a frenzy as to what to see and do, since this Halloween 2011 makes for four days of celebrating–Friday, Saturday, Sunday and Monday. Pace yourself. Pick and choose. And remember, Halloween will return again in 365 days. Here are a few of hundreds of events for Sunday, October 30, 2011. See more events!