That is true and a good point, kaylorinhi. I know Matix was in the Marines and Platt was in the Army Rangers, I think. Im not sure about the agents military background, I know at least one was a vietnam vet. However, it did seem that Platt/Matix were more innoculated to stress you said. They were ready to react with heavy violence at the drop of a hat. I think the agents underestimated the response their adversaries had to the felony stop .
I think its good you use this shootout at your job for examples. It provides a lot of information on how people can react in a shootout. How stress is a major factor; to have a combat mindset. Also, how adrenaline can keep you going even though you are technically dead.