NO what your friend is feeling is called adrenaline. Everyone gets it when something pumps you up. Even more so in a fight. Weed, does nothing for you in a fight, trust me. I've been in plenty, stoned and not stoned. There is no difference.

Adrenaline can make it so you dont feel anything for that time period but what it really is, is that your brain is focusing on something else besides that part of you that's hurting. When you stop fighting you feel the pain right?? it's becuase your thinking about it