The team wanted to create the loudest foghorn blast the Bay Area has ever heard.
The Giants invited all fans to help with this "only in San Francisco" send-off for the future Hall of Famer.
Fans could go to the Giants website, turn up the volume and hit that foghorn button at noon.
A final farewell ceremony will be held right after this afternoon's game to celebrate Bochy's 25-year career as a manager.