In the latest TITIT, Mark reported experiencing the Bystander Effect for himself, in which people were potentially letting another human die rather than helping.
http://en.wikipedia.org/wiki/Bystander_effect also includes several examples.
My management lesson: "Somebody call 911" doesn't generate results. "Tom, call 911" does. It's one of the lessons I synthesized on my own before becoming a MT devotee a few years ago.