Continuity mistake: When Elmer comes out of the grocery store at the beginning of the short, he is holding a grey shopping bag containing carrots. In the next shot, the bag is now white, and in the shot after that, it is grey again.
Continuity mistake: When Dr Killpatient (Bugs Bunny) arrives at Elmer Fudd's home, the "Rabbititis" sign that was on the front door earlier in the short has disappeared.
Continuity mistake: Elmer Fudd is standing by the door when he reads the sign on it, but when we see Bugs Bunny in the next shot, Elmer is nowhere to be seen. The style of the words "No One" also changes between shots, as does the doorhandle.
Continuity mistake: When Bugs Bunny is standing by the door with a pot stuck on him, you can see that the door has a handle and panels on it, but when we see Elmer Fudd behind the door later on, the panels and handle have disappeared.
Continuity mistake: When Elmer Fudd is on the telephone to the operator, you can see that he is at the far end of the lounge and there is a pattern on the wall, but when Bugs Bunny sneaks in behind the radio, Elmer is now positioned near the corner of the room and there's no pattern. 2 lamps also appear by the archway.
Continuity mistake: When Elmer Fudd comes into a room and finds that it is painted with spots, you can see that he is standing by the table but in the next shot he is standing by the door.