Gomez and Morticia run four swords apiece into the basket while Fester hides in it. After Fester gets out, a close-up of the basket interior shows ten blades at differing angles than their outside appearance.
When Thing offers the phone to Bennie the Bookie, and when he hands Gomez the telescope, he is a left hand instead of his usual right.
Gomez told Pugsley that no Addams has worked for 300 years. But in Morticia and Gomez vs. Fester and Grandmama (1966) he told Fester that when he was young, he "sold newspapers, collected bottles, etc." so that he can buy 1 stick of 40% nitro; which would then mean that he had "worked" and already broken the tradition.