Yeah - this sort of thing should be extreme consequence or take-out territory (and I'd be rather hesitant to cut off someone's hand or the like with a take-out result unless either the player suggested it, or it was explicitly on the table at the start of the conflict - something like "Looks like someone framed you for a major theft; if the city guard gets a hold of you they're going to cut off a hand as punishment" - and then make very sure the player has plenty of options to concede - "I get captured, but my loyal crew will break me out, so I don't lose a hand, but have to flee the city," or "I miss the leap from rooftop to rooftop, break through a weak spot in the ground, and now have to find my way out of the sewer system... but the guards didn't get me," or etc.)