These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: End Of Watch
Nightmare Fuel: The scene in which Taylor and Z find the room full of the disected bodies of the cartel's victims is pretty chilling.
Z and Taylor come just in time to see Officer Van Hausen with a knife in his eye, and a new recruit with a broken in face thanks to an especially huge criminal.
Two two cops respond to a missing children call, and find them bound and gagged with duct tape in a closet inside the house.
Not to mention investigating a cartel member's house and finding a room full of undocumented immigrants, some of whom are children, who are being held like animals in a cage. The fact that it's never revealed what the cartel planned to use them for is even more horrifying.
Tear Jerker: The last 15 minutes or so of the film: Taylor and Z are gunned down by Big Evil and his gang, and Z doesn't make it. Taylor somehow survives, and at Z's funeral, he doesn't get more than four words into his eulogy before breaking down.
In a bizarre case of Mood Whiplash, the last 3-4 minutes is the film's Crowning Moment of Funny; in a flashback to the day of the shooting, Taylor and Z are casually chatting in their squad car, and Z recalls the memory of hiding under his girlfriend's parents' bed as a teenager, and they start making love unaware that he's there.