When your Kindred ADC suddendly decides to towerdive the enemy Braum/Vayne combo...
...while they are both full HP and have all Cooldowns ready... And then complains that you just let her die... And the repeats this, four times in 10 minutes... Then rages in /all how she is only losing because you picked a troll support (Maokai), and you are just sitting there, trying not to rage
