dark enough for me..
I'm actually really glad you titled this "Up," otherwise I think I'd find it a little morbid... Seems more like someone is jumping into the air instead of, well, something less pleasant. Besides that, I think this is a really excellent shot!
I like the shadows and I love that you chose to make it in black-and-white...
aw.. i think it's a very meaningful shot :3 i dunno.. i just feel like it. haha. Ü