President Nixon Visits Anti War Protestors, May 9, 1970, 4:15 AM

This scene from the Oliver Stone movie, Nixon, is based upon an incident that really happened. On May 9, 1970, at 4:15 AM, President Nixon, who was wrestling with insomnia, took off with his valet without consulting the Secret Service. 150,000 student protestors were surrounding the White House but that did not stop the President from reaching out to them.
This is similiar to the story of President Nixon showing up at Jackie Gleason's house alone at midnight and driving him out to Homestead Air Force Base to view alien bodies.