I did this in 2009? It has been 2 years already. Okay, maybe it is a Spirited away inspiration, I don't know myself. I did it one day after arriving at Singapore, just before going to sleep. I think I was inspired by the sky I saw from above, when I was on the plane. It was a wide and beautiful sky... But I didn't like it when we entered into them... I have plane sickness after eating... I used a colerase pencil. My hand was hurting after I finished it, because the colerase pencils are very light.