I learned it from my dad, but as @smarandr says, I rarely see blood....but I still do it.....muscle memory I guess.
I too thought it was a big spike. He obviously ate a lot of my Minnesota alfalfa and corn! Sure tasted good last night.
A bit of a shoulder series, but for guys passionate about turkeys I'd suggest Pinhoti Project. No blinds, no decoys, no reaping - just real traditional hunters that have a real reverence for the birds, land, and experience.