UMUR "Omvendt Blå Kors (Greatest Hits 1986-2002 Volume 4)" is the 4th full-length studio album by Danish metal act Red Warszawa. The album was released in September 2002 by Gusten Fætter Records. The title of the album translates into "Inverted Blue Cross (Greatest Hits 1986-2002 Volume 4)".

Red Warszawa continue to play their hybrid thrash, heavy metal, crossover, punk style on this album, so in that department there are no surprises. Guitarist "Heavy" Henning Nymand still produces one powerful, groovy and memorable riff after another, while lead vocalist "Lækre" Jens Mondrup spits out one silly and most of the time really funny obscenity after another. Off course completely out of tune. That man just can´t hit a clean note. The lyrics are predominantly in the Danish language but there are the occassional German and English lyric phrase on the album too. There are some absolutely hilarious lyrics on the album in tracks like "Barbiedukkeland" ("BarbieDollCountry"), "Bøsse dræbt med stegegaffel" ("Gay Man Killed with Carving Fork") and "Jeg ved godt jeg ikke skal sove med en hånd op i røven" ("I Know I´m Not Supposed to Sleep with a Hand Up My Ass"), but you could pick any track off the album and you´d be exposed to this silly type humour. The lyrical themes are most often about drinking, smoking hash, heavy metal, odd and obscene sexual subjects and just general mockery. Red Warszawa always deliver their message with a gleam in the eye though and you are never in doubt that it´s all about having fun ( and about drinking lots of beer).

I´d say "Omvendt Blå Kors (Greatest Hits 1986-2002 Volume 4)" is pretty equal in quality to "Tysk Hudindustri (Greatest Hits 1986-2000 Volume 3)" from 2000. They are both solid albums but not as great as the first two albums by the band. A 3 - 3.5 star rating is warranted.