Pfizer's shareholders most certainly regret the day when the company thought Mary McLeod, their global head of HR, who was their snake, was a great hire.

A most interesting, alas lengthy, read about the whole sordid affair and why it may be a bad idea to hire a snake (or a multitude of them) can be found here : http://features.blogs.fortune.cnn.com/2011/07/28/pfizer-jeff...

[edit: grammar]