https://en.m.wikipedia.org/wiki/Death_march_(project_managem...
The source:
There's a certain book you should go and read... I think the fact that it does exist is proof itself of how adversarial relationships can get in Software Engineering: http://www.amazon.com/Death-March-Edition-Edward-Yourdon/dp/...
Metaphorically speaking, the only way a negotiation does not end up in a fight is when one side sucker-punches the other.
http://www.amazon.com/Death-March-Edition-Edward-Yourdon/dp/...