The Snowman Danceemote was released during the 2007 Christmas event. This emote was unlocked after the player had completed a snowman. The emote was also unlocked during the 2008, 2009 and 2010 Christmas Events for players who missed it the first time.
Originally, a player's wielded items in their sword and shield slots would appear whilst doing the dance. This has been fixed.
When the emote was initially released, there was a glitch where if you home teleported and clicked the emote, the circle would appear, but you would still dance.