boudicca wrote: Exactly. It's pretty hard to underestimate just how deep those herd instincts run. Of course, so many animals evolve with them because in many cases it helps them survive, but it's one hell of an irony when they end up contributing to the mass slaughter of so many of our own species.
We should always be on the alert... these sorts of experiments help remind us of the potentially very dangerous quirks of human nature...
after watching the tube and how the rescue troops are getting people out of their homes as the water is so contaminated...one of the locals getting into the boat said "Yeah there are piranha in this water" 
sorry but no wonder people are leaving their homes peacefully and quickly.....And then the part that tickled my fancy was that the zoo that has been damaged....none of the animals were killed...now that is what makes life so interesting...when karma is involved...
Now if that was the case....do not think swimming is an option anymore...more like Noah's arc....