The Wilhelm scream is a stock sound effect of a man screaming that has been used in more than 360 movies and television episodes,beginning in 1951 for the film Distant Drums.
According to this, The Atlantic, article, Alec Baldwin and Christopher Walken are, supposedly, the only two actors invited to host Saturday Night Live (SNL) whenever they want.
Six Degrees of Kevin Bacon is a parlour game based on the "six degrees of separation" concept, which posits that any two people on Earth are six or fewer acquaintance links apart. [Librarian's note: My brothers and I played this game as teenagers, but with Anthony Hopkins as the central figure, and tried to link him to other actors by mentioning three (or less) actors & the films they were in. Try it out! ]