Shrimp Pot Incident

My dad got a shrimp puller and rigged it up on his boat and for the last couple days we've been pulling shrimp pots. Three days ago I was helping my dad with the shrimp puller when the rope all of a sudden started twisting up around it self and my finger got stuck in between. It cut the circulation of from my finger and it felt like it was going to break. My dad had to cut the rope to get it free.  Afterward my finger was still numb but it regained feeling pretty quick. Now its just the joint that hurts.