how did zane's son get his finger cut off?

[Torque]

It pinch the tissue/skin/etc off down to the bone, the finger tip above and finger below were intact, the bone was not crushed, and they were able to save it. It is functioning, there is probably noticeable scarring, but I think there is still nerves/feeling throughout. De-gloving is an instant bile-riser word, no matter how much blood & guts a person can take