Glenn meets his demise in the comics during a particularly intense and chaotic event. The circumstances surrounding it are quite harrowing and have a significant impact on the story's direction.
Negan's death in the comics occurs at a specific point, but I can't recall exactly when off the top of my head. You might need to do a detailed search or refer to dedicated comic forums for the precise moment.
When trained by Deidara in fanfiction, Naruto's view of art could change. Deidara has a very distinct view of art as something that is transient and explosive. Naruto might start to see the beauty in destruction in a way, which could make his character a bit darker. His attitude towards his enemies might also change. Instead of always trying to redeem them, he might be more willing to use forceful and destructive means to defeat them, as he has learned from Deidara's combat approach.
They can introduce a race against time. Maybe Deidara needs medical help within a short period, but there are obstacles in the way, like the enemy still lurking around or the nearest medical facility being far away. This time pressure builds tension as the reader hopes he'll make it in time.
Iron Man meets his end in a particular comic arc where the circumstances are both intense and unexpected. It's a turning point that shakes up the entire comic landscape.
In some fanfictions, Deidara might give Naruto training on explosive jutsu control. Since Deidara is known for his explosive clay techniques, he could potentially teach Naruto how to better handle and utilize explosive elements in combat.
Well, Glenn's death occurs during a particularly intense and pivotal moment in the story. It's hard to give an exact chapter or page number, but it's a memorable event for fans of the novel.