Originally Posted by Jax08
Yes that can really happen. You can also crush a trachea with a regular flat collar or leave it on so that it becomes embedded like I suspect happened with this prong. These are tools and all can be abused unfortunately.
This is abuse, doesn't matter if its a prong that's been used improperly, altered/sharpened, or an embedded flat collar, there is a human to blame, not the tool.