Ivan Pavlov performed an experiment. He'd ring a bell, feed the dogs and did that repeatedly. Then he removed the food and the dogs salivated at the sound of the bell anticipating being fed. The good thing is that they can be unconditioned or decontioned over time. They will eventually stop salivating. So the don says certain buzz words(the bell) and the crowd goes wild and cheers and shouts "LOCK HER UP"(the crowd salivating). They know what's coming. He knows how to fire them up. Conditioned response. It's interesting to see how effectively he be and how much saliva his crowds have. They never run out of it!
