It does make me wonder, those who have a hard time understanding the type of wound Bishop had there, that they must not have dealt with much in the way of physical injury. People can take quite a bit of abuse without "passing out."
There was a guy who cut his own arm off to escape a bolder. Didn't faint. There was a story of a man in the middle east, at the epicenter of a malfunctioned IED (Premature explosion) he took a really bad hit, but he was able to get up and walk away from the situation.
Or, if you want to get really nasty and graphic. Go look up victims who have been hit with a shotgun blast to the face. They're very much awake and aware, with most of their face gone.
Having a wrench bash your shoulder and then cut your ear into a dangling bit of flesh is not that crazy or out there. Painful? Oh, no doubt... BUt you could survive it, be conscious.