Forgetting to do important  things is irresponsible.
Ian works at a store as the closing manager and is finishing up for the night.
Ian wants to get home.
Ian doublechecks that he did everything he needs to before leaving.
Ian rushes and forgets to lock the front door of the store.
The store is fine, and Ian is commended for his work.
The store is robbed, and Ian is fired for forgetting to lock up.