One human captain has a very, intense, reaction to adrenaline. Thankfully, the crew is understanding. (I was thinking crying/sobbing but if you get a better idea then that's perfect.) -- Anon Guest
Adrenaline is a powerful chemical. It does not, as many expect, make Humans violent. This is just one way for Humans to react. The typical reactions caused by Adrenaline is one of two: Fight... or Flight. Without emotional direction, the side-effects include nausea, an urgent need to vacate the bowels, and tremula in the extremities.
In the case documented by the Baron Munchausen, their Captain Rhees suffered from anxiety, and the use of an adrenaline dart against him did not turn him into a ravening ragebeast as the opposition expected. It augmented his existing fear, which can have interesting angles. Fear can do odd things to a Human.
In this case, Captain Rhees fell to his knees, screaming and crying. The attackers paused, first because they were not expecting that reaction, second because they reasoned it might be a ruse. Third... because a screaming Human usually meant an attacking Human. That last one was the thing that broke them. They were unfamiliar with this reaction and broke to flee the field.