This is Iron Maiden's fourth fully instrumental song. It doesn't sound as good as the earlier ones, though it's difficult to explain why. It just seems to be lacking the feeling and emotion that can be found in the others. For anyone who might not be too familiar with English, the title simply means "lost for words", or more simply "don't know what to say". "'Orra" is a phonetic pronounciation of "horror" in the London cockney accent. Maybe Harris himself didn't like this piece and decided to call it "Big Horror"...