Recognizing that only a select few people would know why she killed Coin not Snow, Katniss prepared to ingest a suicide "Nightlock" pill, but Peeta stripped the poison from her as she was carried away by rebel guards.
In the aftermath of killing Coin, Katniss tries to take her nightlock pill but Peeta stops her, a parallel and inversion of their attempted “suicide” in the first book.
Instead of battling against Peeta, however, Katniss pulled out the nightlock berries, which she and Peeta threatened to consume and leave the games with no victor at all. Before they could swallow them, Claudius Templesmith took back the change, and both were announced as victors of the 74th Hunger Games.
Peeta knocking the nightlock pill from Katniss's hand didn't stop her from wanting to die. While in captivity, Katniss refused to eat and had grown extremely thin. The days dragged on and became weeks.
The Hunger Games (12/12) Movie CLIP - Rule Change (2012) HD
Why was Katniss gonna take the Nightlock pill?
Recognizing that only a select few people would know why she killed Coin not Snow, Katniss prepared to ingest a suicide "Nightlock" pill, but Peeta stripped the poison from her as she was carried away by rebel guards. Hours later, Katniss is visited in the Capitol jail by Abernathy - who reads a letter from Plutarch.
Peeta continues to protect Katniss, preventing her from taking her nightlock pill. Gale fails to shoot Katniss as the guards take her away, just as Katniss failed to shoot him earlier in the novel as he was being captured by the Peacekeepers. In the end, neither Peeta nor Gale is able to kill Katniss.
Snow laughs after Katniss killed Coin because he enjoys the irony of the situation. He avoided the official execution ceremony, even though Panem's citizens still take their revenge on him, while Katniss ends up snatching away the victory and power that Coin thinks she has successfully secured.
Answer and Explanation: Prim is killed by a bomb at the very end of the battle. Alma Coin sees an opportunity to turn the Capitol troops against Snow, and she decides the resulting loss of life from her plan is a worthwhile price to pay.
Despite being demented and megalomaniac, Snow is also honest, and clings to his agreement with Katniss that they do not lie to one another, even if she doesn't. This also leads him to laugh mockingly when he is being executed, entertained by the sheer irony of the situation.
The film included an additional scene during the earlier training sequence where Foxface successfully identified various plants and berries. This suggests she could have known the berries were poisonous; her choice to eat them regardless is often theorized as having been an intentional act of suicide.
NightlockNightlock, the poison of the forest, doesn't actually exist, but its name is most likely derived from two living plants with similar toxicity: deadly nightshade (Atropa belladonna), and poison hemlock (Conium maculatum).
Why didn t they just let Katniss and Peeta eat the berries?
They put the berries in their mouths but didn't eat them as the Capitol changed their minds yet again and declared them both the winners. If Katniss and Peeta had eaten the nightlock berries, they would've died, and there wouldn't have been any winners for the 74th Hunger Games.
How Katniss Deals with Her PTSD. It's no surprise that Katniss becomes traumatized—after all, the Hunger Games are the perfect breeding ground for PTSD. Severe, life-threatening, interpersonal violence as well as witnessing atrocities and killing enemies in combat are particular risk factors for the disorder.
When Peeta talks about how he hopes someone else will kill Thresh, Katniss starts to cry because she doesn't want anyone else to die, which is unacceptable from a tribute in the Hunger Games. Instead, she disguises her tears as homesickness.
Gale was responsible for creating weapons that would trigger a second wave of bombs to target first responders and combat healers. This invention potentially ended up killing Prim, but even if he wasn't directly responsible, Katniss found this tactic so abhorrent that she lost her affection for him.
Even though it was a risky move (cause who knows if it work out) Coin knew Katniss well. And by killing Prim, and making it seem like the Capital's fault, she was hoping to get Katniss' support in becoming the next leader.
Alma Coin was the true villain of The Hunger Games, with Katniss actually seeing her as more of a threat than Coriolanus Snow. At the same time, it was Snow who was made out to be the bad guy in previous movies, making some question why Katniss killed Coin and spared him.
She remembers that they did indeed promise not to lie to each other anymore, and she realizes that Snow wasn't lying to her about Coin's role in the parachute bombing. He has no reason to lie to Katniss. His death is certain, but the future of the Capitol is not.
Essentially, Katniss was afraid that if she was to kill President Snow, then the whole revolution fails, and the rivalry would still continue. Therefore, Katniss had to sacrifice by killing Coin in order to end war, and knew that Coin couldn't do anything better than Snow to save the Panem.
Notably, she is responsible for feeding her family, which she does by hunting and foraging, skills she learned from her father before his death in a mine explosion years earlier. Hunting, however, is illegal and punishable by death. Katniss does it anyway, indicating a rebellious streak in her.
Katniss is acquitted of murder by reason of insanity and sent home to District 12, while her mother leaves for District 4 and Gale for District 2. Other District 12 natives later return, including Peeta, who has recovered his memories and his love for Katniss.
