If you saw Avengers: Endgame in a theater, you remember the moment: Thor's hammer flies into the hands of Steve Rogers, Captain America, and the audience proceeds to go well and truly buck-wild.
The reason that particular cheer-triggering callback landed as hard as it did had everything to do with how carefully it had been set up, in the linear progression of MCU films that had gone before. Audiences didn't know they were expecting it, yet they very much were, because the work had been done to lay the track. So when that moment finally arrived, it proceeded to target and overwhelm their brains' pleasure centers with the ruthlessness of sheer, satisfying inevitability.
