Someone who is happy before or during a battle will inevitably be killed before its end
When a character is excited before a battle, or happy and smiling during one, it's practically guaranteed that before the end of the battle they will be killed, usually very abruptly. Often recklessness plays a part. Blood Knight is an aversion of this trope. Not related to Too Happy to Live. As a Death Trope, all spoilers ahead will be unmarked.
- In Star Wars: The Empire Strikes Back, Dak is excited about the upcoming battle with the Imperials: "I feel like I could take on the whole Empire myself!" Then during the battle, Luke's snowspeeder is shot from behind, killing Dak.
- Also, in A New Hope, during the Death Star battle, Porkins is laughing as he's speeding along in his X-wing, refusing to pull up as the other panicked pilots are telling him to do, and then his ship is blown up.
- In Independence Day, Jimmy is smiling and joking as he heads out to battle the aliens. Guess what happens.
Nostalgia Critic: "Oh, and here's a big shocker, are you ready for this, it's like a big shocker, holy smokes you're not gonna believe this, I mean it's just incredible, are you ready, are you ready, sit down, it's just incredible, are you ready? THE BEST FRIEND DIES!"
- Looper is all about this trope. When a Looper "closes his loop" (kills his future self), he usually celebrates happily with his friends. And then, fifty years later, he is kidnapped by his former employers and sent back in time to be killed by his past self.
- In Rise of the Planet of the Apes, Dodge Landon loves torturing the apes under his care, usually with a shock stick. Then, when Caesar breaks the others out of their cages, they spray water on him and the shock stick, which electrocutes him to death.
- In The Avengers, Coulson is so happy to meet Captain America and work beside him, and to maybe assemble the Avengers as is his dream. To save his dream of that, he takes on Loki and gets literally stabbed in the back.
- In Harry Potter and the Deathly Hallows, Fred and George are fighting some Death Eaters when Percy joins them, shouting at the Minister of Magic "Have I mentioned I'm resigning?" Fred starts laughing, delighted that Percy is cracking a joke, and then the roof falls on him.
- In Mass Effect, before the first mission, Jenkins is excited about his assignment. Shortly after you land on Eden Prime, he's shot by geth drones.
Hello, Unknown Troper. You'll need to get known to lend a hand here.