Question: When Shane pulls Peter out of the ball pit it looks like he is wearing a cast on his right leg. Does anyone know if this is true?
Question: Shane tells Lulu a story about a family of elves that's a little obscure. Is it just meant to be another demonstration of Shane's obsession with military action, or is the story based on anything?
Answer: He is telling a story of one of his missions and just changes soldier to elf.
Answer: No, it is just his sock.
It's a cast with a sock over it. Since the movie is shot out of sequence, possibly he might have hurt it during production.