Interesting idea! I have to admit, I've done these in about half an hour, so no great time spent on them. But I wanted to have at least heard some of the new stuff before doing anything - now I have, I felt I could play, like you say, just for fun!
The word 'impossible' made me think of round shapes, for some bizarre reason, and this piece of artwork I had made a couple of years ago seemed to work nicely.
This one uses John's eyes from one of the pictures I took. The camera shake made such a cool little efect over his pupils, so I thought it would look good in a cover context.
In the blue light, blue light...