This is because an additional kill is counted each time a monster resurrected by an arch-vile is killed again, and upon killing a monster not present in the level when it began (i.e.
While this is occurring, the final values can be displayed immediately by pressing the USE or ATTACK key ( or by default) or the key. The pistol shot sound is played repeatedly while counting, and the barrel explosion sound is played when the actual value is reached. Each scoring statistic counts up from zero to its actual value.
