I played a game and there was an ahri who was kinda fed, and had got a quadra, I was olaf and she was chasing me through the jungle, and all i had to do was E her and she would have died, but then she charmed me and i died, giving away a penta that should never have happened because of my stupidity. What would you do if this happened, I just feel like the biggest idiot, and don't know what to do at this point.
keep playing
That's not giving one away...
Giving one away is walking in to the player that got a quadra and dancing while they kill you...
She chased you and I'm not sure whether you're selectively remembering things (perhaps your e was on cooldown, or you were waiting for an opportunity to turn in a bush so she wouldn't see it coming, who knows), but you're melee and she's ranged so there's no guarantee she would have let you get within range before charming you, and in the end she succeeded in landing the charm for the kill.
And even if you're certain you gave it away, just think about how happy that player probably was (who knows how bad a day they could have been having up to that point) and that one death almost definitely didn't change the result of that game so it really cost you nothing to let someone else be happy. So just smile and move on ;) Oh, and make sure the next penta in one of your matches is your own.
