I thought I was going to have to double-check the AFMA for all my lenses when I saw the subject, but I like your interpretation of sharpness, Neuro.
Good start, Bob. How big is that blade? Looks like it's sharp enough to cut your arm off, not just your hairs.
I'll try my luck with this prickly pear cactus from South Plaza island in the Galpagos.
1D Mark IV, EF100-400mm f/4.5-5.6L IS USM @ 400mm, f//5.6, 1/250s, ISO 400