The genre of music shared, by a vocalist from Napalm Death who made a guest appearance on Leng Tch'e's 12-track Hypomaniac, and Jens Kidman is extreme metal.
Mark Andrew "Barney" Greenway (born 13 July 1969) is a British extreme metal vocalist, who has been a member of Napalm Death, Extreme Noise Terror, and Benediction. 
Jens Kidman (born 8 June 1966) is a Swedish metal vocalist. 
 A video was made for the song "Totalitarian" on YouTube , featuring a guest appearance by Barney Greenway of Napalm Death. 
