Official Internet Mom
Unusuals have been highly sought after ever since they came out. First was Vanilla TF2 - all stock weapons and no hats or misc items. Next, came the Weapons update where you could acquire new types of weapons. Then the game changer - Hats! Thus, the Birth of Hat Fortress 2! Hats were all the rage until Unusual Hats were introduced. The first 14 Unusual Effects were added to the game with the Mann-Conomy Update on September 30, 2010. And now the never-ending quest for Unusuals that has continued till the present. There are Unusual Hats, Unusual Metal, Unusual Weapons, and Unusual Taunts. Post anything about Unusuals here!
Here is a Video that showcases one player's version of the many types of Unusual Hat Effects as of 2014.