The Umbrella Man Imagine this. The President of the United States rides in an open limousine into Dallas's Dealey Plaza.
Nothing looks suspicious.
Such slow speed and turns can be clearly dangerous for a president riding in an open car in a motorcade. But no one seems concerned. Certainly not the carload of Secret Service agents riding right behind the limo. At the first sound of gunfire, Hill immediately jumps to the pavement and runs toward the stricken President, while at first the other agents just don't seem to know what to do. But never mind that.