I think he misread the situation. If you're an EMT it is clearly in your best interest to remain calm and project an air of calmness to others because you're g

I think he misread the situation. If you're an EMT it is clearly in your best interest to remain calm and project an air of calmness to others because you're going to be in situations where the shit is hitting the fan and keeping your cool is the difference between someone living and dying. An EMT calmly telling you that you really should go to the ER with them is likely not being "nonchalant", just level-headed. I'm sure this guy is sick of hearing it by now but he made an unwise decision, even if it turns out he's fine after all.