Not in my own game admittedly, I was spectating one of my roommate's matches, but I have finally witnessed a legendary PentaRagequit.

Amumu ult followed by Kennen ult followed by a series of Darius ults. Enemy LeBlanc managed to flash over a wall and away while her clone was being killed, but she still got ulted by Caitlyn with nobody to defend her. All five members of the enemy team disconnected when the ace was announced. It was beautiful.

That is all.

You know a team doesn't really like the game when they all decide to just quit the game instead of surrendering

That has got to be a nice ego boost.

I wish I had been there to witness it, it sounds pretty epic