Kaizer's Orchestra is a Norweigan rock band. The sextet is known for their unique sound and amazing live shows, which often involve playing on empty oil drums. Their lyrics deviate from the usual themes of love and relationships, and tend to lean more toward themes of revenge, russian roulette, and fighting. Many of their songs are also about certain characters, who tend to show up in several songs on an album. One of the most common symbols of the band is a gas mask, an article which is always worn by one member of the band.
A legend about an Eastern European criminal who was once stuck between a rock and a hard place and he killed his wife and two children just to show his opponents that he meant business. Ever since then other criminals tell the story to their kids at night - rat on your pops, and kaiser soze will get you!
References all criminals, or people who scare others very deeply. One may be unsure what this "Kaiser Soze" person is capable of. It is a good bet that the worst one can imagine is probably true, or close to what they are capable of. An unpredictably violent person. One who takes great pleasure or care in their violence and deception.