The membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell.
Our molecular heroes are trapped in an elaborate vacuole prison within a cell. They have a plan but it will require energy. If the vacuole membrane and cell membrane fuse together, they might be able to force themselves out. With action and suspense in every scene, the molecules will attempt the greatest escape.
An animal cell is an example of a cell that can perform exocytosis.