i really like that first one a lot. great idea and with some special care in lighting that x-ray film (at least that's what i'm assuming it is) it could be even sweeter. I think if you blended the top edge of the film into the picture more in ps it would look cooler and "morph" the two images more. Also great concept on the throwup one.
i'll admit some of the shots are blown out in certain areas that are white, but according to my histograms the important stuff isn't blown out really. i'm using a 430ex into a reflective umbrella in those shots.