grenv: Yes, Although it was incongruous with the others, I reckoned you were referring to that player's second move (ie. third overall) just for that instance.
I agree that if your opponent has just made the 4-point then there's the danger of becoming closed in, but rather than put a blot on the 5-point with 24/20, it's better to grab the point entirely 24/20(2) and be secure, especially in Gammon-Save.