You've gotten an error because what you've requested is beyond the available range. (My time is my time, not yours.) Although I think a 413 would make more sense—the request is larger than the server is willing to process.

That's the one - although 413 makes a lot of sense too :)

"Requested Range not satisfiable," perhaps? I don't quite get it, either.

Oh, it's an HTTP code. Very nice.