In the army, any combat staff with a rank of sergeant or better should have what it takes to be calm in that situation. That's why there are residencies. One

In the army, any combat staff with a rank of sergeant or better should have what it takes to be calm in that situation. That's why there are residencies. One of my mentors would chuckle during an intense situation and say "pit sweat!" Another would say "all bleeding stops eventually...". With students, the nurses are often keeping it cool until the student calms down. Many people can learn to stay calm.