Types of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. 1  Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.
System of a Down's music has variously been termed alternative metal, nu metal, hard rock, progressive metal, thrash metal, art rock and avant-garde metal.
Monkey Wrench is an up-tempo rock song, written in the key of B major and performed with distorted guitars in Drop-D tuning. The song opens with a descending guitar line over a chordal riff of B5/F#5/E5 for two bars. After a gap, the main verse enters with vocals and a choppier, palm-muted version of the intro riff.