Berserk
A state of mind which is a harsh reality for soldiers in dangerous conflicts. Derived from the Germanic word "Bear-Clad", it is a rage named after Viking warriors dressed in bear furs, intoxicated by mushrooms and spirits, engaging in frenzied combat. Today, it is sometimes synonymous with blind rage or uncontrolled frenzy, as a soldier mindlessly fires off his weapon, regardless of proximity of friend or foe.
Limited testing when aliens are at or very close to 0 Morale shows that totally demoralized aliens berserk (as opposed to panic) about a third of the time:
Min Ave ± SDs Max Count 2 5.66 ± 1.95 10 Percent 12.5 35.4 ± 12.2 62.5
N = 38. Each sample (N) is the number of aliens that berserked (instead of panicked) out of 16 aliens at or very close to 0 Morale.
As you can see, it's highly variable. With a rate of about one third, it's fairly common, too.
Percent berserking may or may not differ if Morale is significantly higher than 0 (not tested).