When you're desperately needing to end a blazingly close match and group up after a 40 minute Baron
Then, your [insert ADC/Tank/important teamfight champ] gets caught out after feeling bloodlust and looking for easy kills.
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Then, your [insert ADC/Tank/important teamfight champ] gets caught out after feeling bloodlust and looking for easy kills.
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Tough call between the jungler who decides he just has to go get wolves/krugs/whatever even though it's 40 mins and he's full build, while the rest of the team is trying to push. Or the ADC who decides that it's a good idea to go solo push a lane with no vision putting them right close to the 5 enemies that just based/spawned.
It's usually whoever is the most fed on the team to be honest. The player who thinks that having a kill count of over 10 makes them god only to be slapped hard with a dose of reality by the enemy.
Jungle, Mid, Top, ADC...It could be any one of those.