Watch this video tutorial to see how to do a "Y2K rollover" balisong knife trick.
The balisong knife, commonly referred to as the butterfly knife, has been portrayed negatively by the media and as a result has been outlawed in many areas throughout the the United States. The balisong knife is frequently associated with gangs and violence for no legitimate reason, but merely because it's frequently a "bad guy" weapon in movies and television.
The balisong's sometimes flamboyant manipulation techniques have given it a bad reputation when it's a legitimate art form, and the knife itself has very real and practical applications.
Just watch to learn the "Y2K rollover" with butterfly knives. This technique is was first seen at Balisong Xtreme.