A lot of things can impact coordination in minor ways that are nevertheless enough to make someone injury-prone. Autism spectrum disorders, joint stability issues, allergies, etc. If you have more than one, it gets really fun.
I often wonder how these FMLs get published and mine don't. Not that I feel self-important, but really? Being accident prone is unfortunate and pesky, but at least you aren't the person in colonoscopy FML under this.