What if one was to try and.. warp one's sense of time. It may sound silly but try and think about it - If in a lucid dream, one comes to complete control - being able to do all the different things, fly, explode stuff, 'magic' and so on. Why shouldn't one then be able to 'slow down timeflow'. Meaning, why shouldn't one be able to make a lucid dream feel 5 hours long instead of 30 minutes? Just throwing it out there, I'm sure someone else has thought of this before though