From Team Fortress Wiki

"Soldier of Dance" is one of the song titles featured on the official Team Fortress 2 Soundtrack, listed as track number 27. Added in the Gun Mettle Update, it is a full version of "Cossack Sandvich", the music which plays during the Kazotsky Kick group taunt. It is one of 32 main menu startup themes.

Video

Trivia

This music was first heard in the Counter-Strike: Global Offensive map de_train , coming from a small radio in a cafe upstairs to the right of the Terrorist team's spawn area. It differs from the Team Fortress 2 version in that it is at a slower tempo and has fewer instruments and no vocal chanting. Because the audio is coming from a radio, it is muffled and has a narrower range of treble and bass. It can be heard here. The radio on Train no longer plays any music.

, coming from a small radio in a cafe upstairs to the right of the Terrorist team's spawn area. It differs from the Team Fortress 2 version in that it is at a slower tempo and has fewer instruments and no vocal chanting. Because the audio is coming from a radio, it is muffled and has a narrower range of treble and bass. It can be heard here.

July 2, 2015 Patch (Gun Mettle Update)