You are a good writer and story teller..............but! There is always a but, huh.
I am calling BS on a 30 minute fight. I know it may have seemed like 30 minutes, but I guarantee you that you all weren't fighting for 30 minutes.
I have wrestled for over 30yrs. I have trained and fought MMA. I currently do Judo. I have been in several "real" fights and witnessed many more. I have never seen a "real" fight last longer than 5 minutes, MAX! Most are over in less than 3 minutes. Most fighters are not in shape and then you add in the adrenaline dump that ALWAYS occurs once you find yourself in a fight, and it doesn't have a chance of lasting very long.
I am not going to call you a liar, because like I said, I am sure it felt like 30 minutes. But, from one writer to another, I would drop the time limit in that sentence or qualify it as "what felt or seemed like 30 minutes." Otherwise people are not going to believe it.
Anyway, keep on writing. You do have some good talent!!