Have you been polishing your crystal ball again? I just came up with an idea only twenty minutes ago that falls in this category.I'm not sure I can do it tonight though.
I took these last night. I was bored. Just a glass of water with some added food coloring. The first one is the original and the second one i did just playing around in photobucket.
I literaly posted this one in the selective color thread minuets before this one started.
got one: