He'd broken his leg dropping down from the rooftop.....

“ He'd broken his leg dropping down from the rooftop. The bone didn't set right, and he'd limped ever after. So he'd found himself a Fabrikator and had his cane made. It became a declaration. There was no part of him that was no broken, that had not healed wrong, and there was no part of him that was not stronger for having been broken. ”

Leigh Bardugo

From : Six of Crows