locos crazys only One of the first prison gangs to develop in the United States, the Mexican Mafia began in 1957 in California. In 1993, San Antonio FBI Special Agent-in-Charge Jeff Jamar called El Eme, often now the name given to the gang on the street, "the most dominant of the prison-spawned gangs operating in Texas," when comparing it to the 10 other large-scale gangs active in US prisons at the time. In 1992, membership within prison was hovering at 700, while in 1998 it was just under 1,500. Today it continues to rise. Outside of prison, La EME is still an ominous presence, responsible for 10% of San Antonio''s total homicide rate, with thousands of members estimated to be operating across the United States.

Fun People is a melodic hardcore band formed in Argentina in 1989 by Sebastián Garay, Julián Pogiese, Carlos A.K.A "Nekro" Rodríguez (also known as "Boom Boom Kid"), and Lucas Sequeira. The band was originally named "Anesthesia" as a tribute to Cliff Burton and his song "anesthesia pulling teeth", which now is the name of their first album. They renamed themselves "Fun People" following legal problems with their original name. Fun People toured Europe in 2000 but disbanded the same year, and the band members are currently in solo careers: Carlos "Nekro" Rodríguez (Fun People's singer) started his solo career as Boom Boom Kid. Carlos "Gori" Loncharich (Fun People's guitar), created a new band called Fantasmagoria (in which he also became a singer). Lucas Sequeira formed a new band called "Cucsifae". The group realized a hit with the song "Masticar", from the album Kum Kum, released in 1996.