Ouch. That must throb!
On horror stories... many years ago on a farm a worker I knew was using an angle grinder on the floor to cut some angle iron. You know, the old down on one knee stance. Apparently the grinder caught and pulled free of his grasp and shot off across the floor. Coming to the end of its cord it yanked and turned round. In a flash it passed across his kneeling calf and tore through to the bone. On reaching the end of its cord it again it made a second pass across his leg before he could move and before finally coming to a stop.
Lots of claret and lots of time off work.
Accidents seldom happen slowly but I do know of one that did.
A friend was on a big tractor, out for the day working a distant fiels with his lunch. Shortly after starting work he went to dimount the tractor before it had come to a final stop in the field. An attempt to save a couple of seconds and often done on farms!!!!
His foot slipped through the tractor steps which trapped him. The foot on the floor was grabbed by the rear wheel and ran up it spread eagling him on the ground but suspended by a mangles leg through the step. He was there for nine (9!!!) hours, and never walked properly again even after years of treatment to save his limbs.