Sprint Retrospective Meeting
This is one of the key inspection and adaptation events which promotes team's ability to take the heights in subsequent sprints.
Keeping this as an imperative action to be performed at the end of any sprint, I just got a scenario to make out.
Lets say, a project got kicked off adopting Scrum.
Development team delivered successful increments at end of each sprint. Project was going smoothly and suddenly due to some reasons, product owner decided NOT to continue this project and asked to stop it completely.