When that champ you wanna play finally isn't banned
When you reach level 2 as Veigar
When you go bot to avoid the enemy Jax and he shows up there anyway
As AP Amumu, when you launch yourself at an enemy and you suddenly see 2 more appear behind him
As Karthus, when the enemy team buys Zhonya's
When a feeding enemy finally gets their act together and kicks your butt
When your Anivia is really good, but they keep interrupting your channels and teleports
When you're completely owning, but can't carry your entire team and lose
When Nidalee hits you with a spear and starts lunging at you
When somebody on your own team starts saying "gg ez"
A Kayle, a Jax, and a Shaco walk into a lane...
When (if) they announce URF as a permanent gamemode