A nightmare is a dream manifestation during REM sleep that can cause a strong negative emotional response from the mind, most commonly fear or horror, but also despair, anxiety, and great sadness. Influenced by metal and rock since his early years, Koszmar discovered electronic music through cinema and video games, notably with "The Matrix" and "F-Zero." He centers his techno around dark, fast, and striking sounds to create an engaging atmosphere that conveys his rage. Basslines and vocals are his trademarks.

After several years with the RaveAlert label, Koszmar decided to leave the Belgian entity and change his artistic direction to focus on a groovier style that aligns with his vision of techno. For him, techno is very personal, which is why each set is different depending on the emotions he experiences throughout his life.