Horizontal creativity?

In a recent article, Dr Mark Lythgoe, Neuroscientist at University College London, suggested -

"When you're lying down, you relax and the brain is better able to drift, helping us to do tasks that need mulling over or require free association. It's a bit like creativity - while it needs some focused work, creativity often needs a period of subconscious processing while you're not thinking about the problem. Lying down seems to free up the mind."

Have you noticed any connection to this theory in your own experience?

Of course it may be impractical in some circumstances, but try this lying down theory when you next create and see if it makes any difference in freeing up your mind and your creative flow...