If my arm got cut off would I feel it?

I'm writing a 1st person science fiction novel and later on in the story my character gets his arm cut off. What basically happened was that, he was in a fight with a creature with these massive claws and he gets close enough for him to jam a grenade in it's throat, but unfortunately he's in arms length... show more I'm writing a 1st person science fiction novel and later on in the story my character gets his arm cut off. What basically happened was that, he was in a fight with a creature with these massive claws and he gets close enough for him to jam a grenade in it's throat, but unfortunately he's in arms length and the creature's claws just slash through his armor, the meat, and the bone and cuts his arm off. So what I'm asking is that do I need to do some research for the right littérateur terms to describe the pain, or would he not feel it at all?
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