Most painful way to remove skin?

[Walt Longmire]

1 hour ago, Huaco Kid said:

My sister was a very good athlete (horse-girl strong).  She once took a mean wipe-out during a track meet,  on the cinder running track (knees and elbows).  She spit on it and walked it off.

Later,  we learned that she passed-out at the hospital,  when they took a wire brush to her.

I sawed into my leg with a chainsaw many years ago. The worst part was when they spread it open and started scrubbing it out.