Can you administer me some examples of "desperate positive feedback"?

It's for our homework in physiology and anatomy. Hope you can help. Thanks. References will be great also. :D
Answers:
An endocrine tumor can produce high level of hormones and thus disrupting the normal bodily functions. Cancer often use an positive feedback to produce it's own growth factors.
The blood clotting cataract works by positive feeback and it can be disastrous if the counterreactions are to weak since it leads to thrombosis . Source(s): http://en.wikipedia.org/wiki/Positive_fe…
http://en.wikipedia.org/wiki/Cancer#Onco…
"It's okay Margarette, I'm sorry to hear that you are uglier than your sister but at least your parents still love you!" Source(s): lmao doubleyouu.nouns.eff!?

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