This is for Thyme Girl since she has never seen the musical play or movie Little Shop of Horrors.
This picture is how I inter-petted the climax of the film/play. In the first panel, Seymour (the nerd hero) decides to kill off the main villain, the plant. Seymour didn't realize HOW much he fed Twoey blood. So in the end, Seymour gets freaked out that Twoey is like 40 ft tall and demands Seymour to give him more food. As some fan once said, "The plant has to lay off the AB Positive blood".