To give a little background (if you don't mind spoilers):
Neji sacrificed his life to shield Naruto and Hinata from the Ten-Tailed Beast's rain of wooden spikes.
Masashi Kishimoto makes this very painful by using the headline: "The battlefield... becomes Neji's grave" WHY JUST WHY
As Naruto mourns the loss of his friend, Obito takes the opportunity to taunt him.
"I definitely won't let you kill my comrades!" ...Was that what you were muttering? Now, look around you. AND TRY UTTERING THOSE WORDS AGAIN!
The realization of this moment should hit you like a ton of bricks
As your comrade's corpse gradually loses its warmth
THE FINALITY OF DEATH!
Let me ask you, Naruto. What's left in this reality for you?
Naruto is about to crack, but Hinata breaks through his despair and reminds him why everyone is still fighting, and what Neji gave his life for.
(The last frame is just my interpretation of what might be a transition to Bijuu Mode because I am physically incapable of bursting into a glowy being of light)
Comments are most welcome because I need to do something about THESE FEELS