The fact that he escapes death, even just momentarily, gives him a brief sense of getting away with some of what he's done, while his enemy, who he himself has helped turn Katniss against, takes the heavily symbolic arrow. Snow laughs after Katniss killed Coin because he enjoys the irony of the situation.
Although he ended up killed by the crowd it wasn't Katniss who ended his life in the execution scene despite that she said over and over that she would kill him. Instead, she ended up killing President Coin and Snow had nothing left to do but laugh as if he won the battle.
It is likely that he is a relative of Hilarius Heavensbee. In the Mockingjay - Part 2, Plutarch appears to smile as he looks at Coin's dead body, suggesting that he approved of her death.
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.
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.
In the end, Spruce and Sejanus are hanged at the Hanging Tree; Snow feels responsible for Sejanus' death and is wracked with grief. According to Jacobson, Sejanus' death is a "defining moment" that is "essential" to Snow's transformation into the evil President Snow fans know from the original trilogy.
She is the President of District 13 and the leader of the rebellion against The Capitol. However, it turns out that she is a corrupt and ruthless woman who is even worse than President Coriolanus Snow.
In The Hunger Games series, Katniss killing President Coin instead of President Snow surprised many. Still, it was because Coin was revealed to be a ruthless leader with her own political interests.
At an unknown point in time years before the 74th Hunger Games, she was personally fired by Snow, the stated reason being due to her being too surgically enhanced.
Katniss's focus on survival and her family's safety prevented her from fully considering romance, but her feelings for Peeta and Gale diverged in the end. Katniss ultimately chose Peeta because he understood her trauma and she didn't want to lose him, proving her love for him.
Peeta, Annie, and Beetee vote no, while Johanna and Enobaria vote yes. After some thought, Katniss demands to kill Snow. Once she receives an agreement, she votes yes, for Prim. Realizing something is up (as Katniss would never do that), Haymitch votes yes, too.
Snow can't stand to see a young woman betray a young man's affection—his view of what happened 65 years ago. And so he takes out his old, festering wound on Katniss.
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.
This comes as a result of Lucy attempting to leave Snow during a rainstorm after they plot to flee the Districts, but she learns that he was responsible for killing Sejanus Plinth during the travels.
Katniss speculates that Coin deliberately sent Prim to die in the Capitol bombing in order to fully gain her trust, but it's never outright confirmed or denied.
Katniss also realizes that, even though Gale had nothing directly to do with Prim's death, the bombing trap that killed her was based on one of his designs, which makes both him and Katniss feel he is somewhat responsible.
Unlike the main villain Coriolanus Snow, she has no redeeming qualities, care for others, or tragedy. Her honor is up to interpretation and it is unclear whether it was so she could manipulate others or it was genuine.
Boggs reveals that Coin had wanted to save Peeta from the arena instead of Katniss. Katniss represents a threat to Coin, and Katniss made the situation worse by forcing Coin to rescue the other victors. Boggs reminds Katniss that she has outlived her usefulness to Coin.
She personally assigned Peeta to join the squad despite the fact that his hijacking had brainwashed him into trying to kill Katniss. This was presumably an attempt on Coin's part to dispose of the girl amid the battle, making her a martyr and preventing her from becoming a threat to Coin's authority after the war.
Katniss became a symbol of rebellion and hope for many people, which threatened Snow's authority. By making her life miserable, Snow hoped to weaken her spirit and discourage others from following in her footsteps. Fear: Snow was afraid that Katniss could incite a rebellion that could challenge his regime.
Snow was 18 during the 10th Hunger Games, making him 8 when the first Hunger Games took place. This means that during the 74th Hunger Games, he was indeed 82 (74+8). So he died at 83 in "The Mockingjay," since that was during the 75th Hunger Games...
Unknown to most people, President Snow poisoned others but drank the same drink as them to cover up his tracks, resulting in perpetual blood sores in his mouth.
