In the ending of "Safety Not Guaranteed," the main character, Darius, decides to join Kenneth in his time travel mission. They share a moment of connection before they enter the time machine, which is a simple van. The film concludes ambiguously, leaving the audience to ponder whether they actually traveled through time or not.

As the film approaches its conclusion, the narrative builds tension and emotional stakes. Darius, who has been skeptical and guarded throughout the story, finds herself increasingly drawn to Kenneth, the eccentric man who placed the ad seeking a partner for time travel.

In the penultimate scenes, Darius confronts her own fears and insecurities. She has been on a journey of self-discovery, grappling with her past and her feelings of isolation. Kenneth, on the other hand, is portrayed as a man who is deeply affected by his own past traumas, particularly the loss of a loved one. His quest for time travel is not just about adventure; it is a desperate attempt to reclaim something he has lost.

The climax occurs when Darius and Kenneth finally prepare to embark on their journey. They meet at the designated spot, a secluded area where Kenneth has set up his makeshift time machine--a van adorned with various gadgets and a sense of whimsy. Darius, filled with a mix of excitement and trepidation, steps into the van with Kenneth.

As they sit inside, the atmosphere is charged with anticipation. Kenneth explains his theories about time travel, and Darius listens intently, her skepticism slowly melting away. In this moment, she sees Kenneth not just as a quirky stranger but as someone who understands her struggles. Their connection deepens, and Darius realizes that this journey is as much about finding herself as it is about time travel.

The final moments are shrouded in ambiguity. As they prepare to "activate" the time machine, the camera captures their expressions--Darius is hopeful, while Kenneth appears both excited and anxious. The screen fades to black, leaving the audience to wonder about the outcome of their journey.

In the aftermath, the fates of the other main characters are revealed. Jeff, Darius's colleague, has been on his own journey of self-discovery, confronting his feelings for a woman he has been pursuing. He ultimately decides to embrace his own vulnerabilities, leading to a moment of personal growth. Arnau, the other member of the team, has been more focused on the superficial aspects of life, but he too experiences a shift in perspective, realizing the importance of genuine connections.

The film concludes without providing clear answers, emphasizing the themes of hope, connection, and the human desire to escape the pain of the past. The fate of Darius and Kenneth remains uncertain, but their decision to embark on the journey together signifies a leap of faith, suggesting that sometimes the journey itself is more important than the destination.

In the movie "Safety Not Guaranteed," there is no post-credit scene. The film concludes with a focus on the main characters and their journeys, particularly highlighting the emotional resolutions and the themes of connection and the search for meaning. After the credits roll, the story does not extend further, leaving the audience with the final impressions of the characters' experiences and choices.

Kenneth, played by Mark Duplass, is driven by a deep sense of loneliness and a desire to escape his mundane life. His ad for a time travel partner reveals his longing for connection and adventure, as well as a need to prove that he can change his past mistakes.

Darius, portrayed by Aubrey Plaza, initially approaches Kenneth with skepticism, viewing him as a quirky oddball. However, as she spends more time with him, she becomes intrigued by his sincerity and vulnerability. Their relationship deepens as they share personal stories, leading Darius to confront her own fears and desires.

The time travel journal serves as a tangible representation of Kenneth's hopes and dreams. It contains his plans and theories about time travel, reflecting his desire for control over his life and the past. The journal also symbolizes his isolation, as it is a private world where he can express his thoughts and feelings.

Jeff, played by Jake Johnson, serves as a foil to Darius and Kenneth. He is initially focused on pursuing a romantic interest from his past, which leads him to make questionable decisions. His character arc highlights themes of nostalgia and the difficulty of moving on, contrasting with Darius's journey of self-discovery.

Trust is a central theme in 'Safety Not Guaranteed,' particularly in the relationship between Darius and Kenneth. Darius grapples with her own trust issues, stemming from her past experiences. As she learns more about Kenneth's vulnerabilities, she begins to trust him, which culminates in a pivotal moment where she must decide whether to believe in his time travel claims.

"Safety Not Guaranteed" is a film that blends elements of comedy, drama, and science fiction, and while it has a whimsical premise, it does contain some themes and scenes that may not be suitable for all children or sensitive viewers. Here are some potentially objectionable or upsetting aspects:

1. Mature Themes: The film explores themes of loneliness, loss, and the search for connection, which may be heavy for younger audiences.

2. Language: There are instances of strong language throughout the film, including profanity that may not be appropriate for children.

3. Romantic Situations: There are scenes that involve romantic relationships, including discussions about intimacy and emotional vulnerability, which may be uncomfortable for younger viewers.

4. Mental Health: The film touches on issues related to mental health and the struggles of the characters, which could be distressing for some viewers.

5. Existential Questions: The concept of time travel and the implications of altering one's past can lead to complex discussions about regret and the nature of reality, which might be confusing or unsettling for younger audiences.

6. Emotional Moments: There are scenes that evoke strong emotions, including sadness and disappointment, which may be difficult for sensitive viewers to process.

Overall, while "Safety Not Guaranteed" has a quirky and humorous surface, its deeper themes and some content may warrant caution for family viewing.