mathematicians, psychists, doctors, lawyers, senior programmers and all, but how about animal expert?  This poor guy fell into the tiger's enclosure and he lost his life.  I could only hope that he died instantly from heart attack while the tiger grabbed his neck like its daily prey.  I can only imagine what went through his mind when that tiger looked at him in the eyes.  My question is,  would it change anything had he stood up and screamed?