Tear Jerker / Fast & Furious

• Dom leaving Letty behind in the middle of the night to try and keep her safe, despite being newlyweds.
• Letty's supposed death, and the reveal of why she was working for Braga/with Brian - to secure a deal with the US government for Dom's safe return.
  Brian: She did it for you, Dom! Letty came to me to clear your name in exchange for bringing down Braga. She just wanted you to come home!
  • Dom's clear look of sorrow and guilt when he realizes that leaving her behind indirectly caused her death.