In the British Navy of old, as punishment, a number of sailors used to be tied to a wheel, and each given a whip, to beat in the back of the man in front. What started with minor slashes ended always in violent whipping. Because people:
Reference? There are a number of stupidly violent punishments administered by the Royal Navy in the past. but that one I've never heard of. Any idiot can face a crisis - it's day to day living that wears you out.
Two Eyes for an Eye: The Neuroscience of Force Escalation. Sukhwinder S. Shergill, Paul M. Bays Chris D. Frith, Daniel M. Wolpert. Science 11 July 2003: Vol. 301. no. 5630, p. 187
a summary is available on-line upon free registration at publication website.
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For a description of what is all about, without having to register, please read Daniel Gilbert.