The 1991 movie was my introduction to the Addams family, and, yeah, I had a VHS of it that I watched way too many times as a kid.
You don’t really see the result of that scene, or have to deal with any actual murder or on-screen violence, everything is played for laugh.
It’s very similar in humour to the first Men in Black movie, also by Barry Sonnenfeld. Very cool cast, especially Raul Julia.



It’s what is referenced here, yes.
Though really, I’ve visited quite a few old castles, and every time the historian guides told the same story : the medieval boiling oil dropping thing is a myth.
Oil was way too precious to waste like that. Those murderholes did exist, especially over the gates, but boiling water did the job just right, along with whatever rocks they could use for impact.
Also, in a coastal fortress I visited, apparently heated sand was a thing too. Quite vicious since it got caught and stayed in armour joints. As a famous person once said “it’s coarse, rough and irritating and it gets everywhere”.