Scantily clad women dancing seductively in front of soldiers who've been isolated, sexually deprived, and in a constant state of anxiety and stress—add alcohol and what could possibly go wrong? When Playboy Playmates come to perform at a USO show, the solders go nuts. They start storming the stage, yelling, "Take it off!" and "You f***ing b****!" The Playmates quickly evacuate on their helicopter. Two soldiers grab onto the helicopter's skids, but then fall into the water.

This is another example of the travel to the dark side, where the soldiers' primal urges get the better of them. It could have devolved into a pretty dangerous scenario. It's a lot like the massacre of civilians on the boat, except that time it was fear that led the soldiers to act crazy.

Compare the Playmates scene with this one from South Pacific and see how much movie-making changed between 1958 and 1969.

Same issue, very different treatments.