The small bumps are moments of minor climax on the way to the larger climax. They are reaction moments or interludes to some action that takes place in your story. The key to this plot shape is that each smaller climax is related to the larger climax and eventually leads to it.
An example: The Hunger Games. There are small climaxes as Katniss defeats each antagonist along the way. After she has moments of rest to recover and then the writer plans her next step. The final climax is the defeat of the last enemies, not only in the games, but the people who are trying to manipulate her outside of the games. She gains control over the games themselves by playing on the sympathy of the crowd to enable Katniss to save Peeta’s life and her own.