Medic's Medimedes Ubercharge line is changed in this sound mod to be a perfect replica of the edit in that snowball fight smexual, now saying "I am the angry bird god of the bird god of the bird god of the badlands! Fear me! Yeeeee!" The line is spoken at 6:08 if you want to hear the original.
To install the sounds in the package, create a folder inside your Team Fortress 2 custom folder and place the packaged sound directory into that new folder. This sound mod will likely not work or cause harsh static on sv_pure servers.