During the hypnotism session with the woman, the position of the doctor in relation to the tape recorder changes. First he is sitting with the tape recorder at his right, then, after the cut, he is sitting with the tape recorder at his left.
While under hypnosis, Barney recalls that he is storing a gun, a "32-caliber pistol" in the trunk of their car while traveling through Canada. Later, when we see him retrieve the gun, it is a revolver, not a pistol.