Hey, they pulled off turning San Francisco into Gotham City for Batkid.
But even though the world watched, mostly from afar, there weren't one million people crowded into the city all at once, which is the number expected to hit the streets on Friday.
Still, who says the City by the Bay can't pull off a Giants World Series Victory Parade followed by some rambunctious Halloween festivities?
That's what the mayor, the police department and the nearly 850,000 residents of San Francisco, plus their guests, are facing with at least two back-to-back major galas.
It means no officers get the day off. And that the Castro Street Halloween party is no longer an official party.
"Discretionary time off was already cancelled due to Halloween," Police Department Spokesman Gordon Shyy said. "Obviously that stays in effect as we will need to staff for a parade now."
Beginning at noon, the 2014 World Series champs will snake through San Francisco at noon starting at Market and Steuart Streets and continuing down Market Street to Civic Center Plaza. Two years ago, the parade went off with no problems. Fans peacefully lined the streets to see Sergio Romo grab headlines with his "I just look illegal T-shirt," and watch Giants' broadcasters Jon Miller and Dave Flemming whoop it up to "Gangam Style" on stage.
Hours later, the neighborhood Halloween trick-or-treating and parties begin.
But since 2007, the city has banned the open Castro Street affair, a tradition that began in the 1940s and had blossomed into a sometimes raucous and violent affair, with stabbings and arrests.
People are still allowed to visit the mostly gay neighborhood to dress up and walk around. It's just that for the last seven years, there are no street closures and police strictly enforce no alcohol rules even though the bars and restaurants are still open.
Despite the crackdown, Mayor Ed Lee's spokeswoman Christine Falvey said people can have fun, and she encouraged people to stay in their own neighborhoods.