So this is a bit abstract. Does it really meet the challenge? I think yes, in a special way. So I took a photograph of a shoehorn.
That's the best idea I got.
I've done a lot post-processing work: Cropping the whole image to put the shoehorn to center and usual PP: Sharpen, Hue, Saturation, Contrast
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If the shoe horn is all you want to show us, then why even include the wall? Go for the full on effect of that curve and move the horn away so the wall is out of shot. Despite all this, it's link to the challenge is just far too tenuous especially if you don't have the title to tell you what it is.