Well, it meets the challenge just fine, it's interesting, funny and nicely photographed. And you had a patient significant other who held a pose very well for you.
Composition is good, nice neutral background. I like the spot of red in the skating shoe. I see nothing negative in this image. Maybee a tad over-sharpened. Oh, yes. Someone pointed out your typing wasn't so good in the title. Ooops.
...ouch. The shot is powerful if only just for that reaction. Composition-wise, might be nitpicking here, but with balance being the theme, showing more of the shin to equal the shoe, and make them meet in the centre would seem more 'balanced'.