Monsterpal wrote:
Siegfried was more of a case of Achilles' leaf, or maybe Achilles' ribs.
Don't you all mean Fafnir? Fafnir was the dragon in the Volsunga saga who was impervious to all weapons everywhere except for one spot under near his left shoulder. Siegfried (the demi-god hero) dug a ditch outside Fafnir's cave and lied in wait for the dragon. When Fafnir walked over the ditch, Siegfried stabbed him in his weak spot and killed him.

Message from Space is also on Netflix Instant right now. I'm going to check it out soon.