McDonald's locations are ubiquitous around the world, but some things still remain a mystery behind the scenes.
If you've ever wondered why the milkshake machine is always broken - or fancy learning how to 'hack' your way to a cheaper Big Mac - speaking to a staffer is quite eye-opening.
Emily Johnson, a current HullLive journalist and former McDonald's worker, was kind enough to answer diners' burning questions about McD's.