Sick Jacken is a member of Psycho Realm, an American hip hop group started in 1989 by Jacken (Jack Gonzalez) and his brother Big Duke (Gustavo Gonzalez) from the Downtown, Pico-Union area of Los Angeles. In 1994, B-Real of the rap group Cypress Hill saw Psycho Realm performing at Olvera Street for an End Barrio Warfare concert. Their performance inspired B-Real so much that he requested to join the group. With this time period being the height of Cypress Hill’s career, anything Cypress-related would get major publicity.

Psycho Realm as a group suffered tragedy on January 29, 1999—one month before the expected release of Psycho Realm’s second album—Duke was shot in the neck in a confrontation while trying to split up a fight at Tommy’s Burger Stand at Beverly and Rampart Boulevard in Los Angeles, which left him paralyzed from the neck down for life.