I haven't studied GR, but I too have always had the same problem with this analogy. It is a crude analogy perhaps suitable for a 1 minute introduction. As far

I haven't studied GR, but I too have always had the same problem with this analogy. It is a crude analogy perhaps suitable for a 1 minute introduction. As far as I can tell, this video gives a far better intuitive insight: http://youtu.be/jlTVIMOix3I http://youtu.be/jlTVIMOix3I