Totally awesome. I can't say I'm familiar with the LSH beyond a few images in old price guides, but that's enough for me to appreciate this joke. The characters' deadpan expressions, and the Boy's casual uplifting of his severed arm, really make this joke.
Nice work on the background, too. It reminds me of Carmine Infantino's Rann cities in Adam Strange (one of the few 1950s comics I've actually read).