Granny tells Jethro to bare his head in the presence of the Stars and Bars. However, the flag is actually the battle flag of Gen. Robert E. Lee's Army of Northern Virginia and not any of the three variations of the Stars and Bars.
Granny and the "young uns" are marching Ravenswood up the Drysdale driveway. Just before she tells them to stop the shadow of a boom mic can be seen on the pavement following them.