Blowhard's last name is Sandstone. The elephant is named Cicero, an unlikely name for a Flintstones character.
This episode is sometimes listed as 'Invisable Barney'.
This episode was recorded on 3-24-62.
This is the episode where the now-famous "Meet the Flintstones" song becomes the show's main theme. It is also the first episode for the DVD to use the new credits and theme as well.