Michael Richards (Kramer) actually hurt his back when Jerry (Jerry Seinfeld) tried to free him from his jeans.
Cary Elwes's speech wavers between an American accent and his native British. This isn't necessarily an error, though-the character could be an expat.
This is the second time George has made an inadvertent comment that breaks up a marriage; he also broke up Robin and Michael's marriage in "The Good Samaritan" with his "God bless you" comment.
Frankenstein is not the monster, but the man who created the monster. *While this is true, referring to the monster himself as Frankenstein has become the norm.*