I once had surgery on my arm in a doctors office. My arm was badly infected with MRSA and antibiotics were only slightly slowing the spread. To try and keep me from being admitted to the hospital, the doctor tried pulling out the infected tissue. The anesthesia he had couldn't penetrate the infected stuff, so I sat there while he ripped out both infected and live tissue with forceps without any anesthesia at all.

It was probably similar to being repeatedly stabbed in the same place with a dull blade. I hope to never have to deal with live muscle and various other tissue being ripped out of my arm again. :/