They are not panicking because they are professionals but if you listen to their voices you can hear how scared they are. I know because I do what they do for a living.

Trust me they are panicking very much so; that is why the locomotive engineer tells the passing train to “notch up” or add more power to the traction motors. They have no options but to stay in the cab, why would they freak out at this point? Cool minds have better outcomes in times of stress.