Update, 07/23/14, 4:50 p.m.: Joe, the man in the picture with Murray, tells us (on Kinja!) that it was all part of stunt he pulled. Good job, Joe:
Hi Gawker...My name is Joe, and I'm the guy standing next to Bill. I own an ice cream business in Los Angeles and I heard through the grapevine that Bill Murray was shooting a movie in my neighborhood last night. I decided to throw a "Bill Murray Ice Cream Social" near set with the hope that he'd show up. How often do you get to meet your idol? I invited the entire neighborhood and the cast and crew of the film for free ice cream. Long story short, the guest of honor made it to the party and the rest is history. Like my dad always says "You'll never dance with the pretty girl unless you ask." If you want to look us up when you're in LA we're @CVTSoftServe on the Twitter, the Facebook and the Instagram.
[Image via Reddit/user betthefarm]