Paul Revere is pulled by a thick rope into the house while lying on his back. After his slide, there is rope bunched up underneath him, but between shots it disappears.
When Lucy 'reels in' Benny on the rope, outside the open door the floor has been taped for the set placement.
When Paul comes flying back through the front door, it is apparent that a stunt performer is standing in for Jack Benny as he does not turn his face to the camera.