Firearms are extensively used in shooting incidents, functions or for recreational purposes around the world. However, illegal modifications to a firearm can pose a major challenge to the forensic community, as their examination and subsequent individualisation are not always easy when compared to standard firearms due to the non-availability of standard comparison material and the damage caused to the firearm during test firing. We present a case report of unusual firing by an improvised firearm adapted to produce a loud noise during a marriage party. This led to high pressure inside the barrel, damaging the extractor assembly of the rifle and caused serious injuries to bystanders. An expert must be aware of all usual and unusual results of firings. In this case, an unusual method of firing two bullets shows the generation of high pressure inside the barrel causing the barrel and extractor assembly to break and act as secondary projectile. These cases need thorough investigation and careful observation to achieve positive outcomes.