As a Physician, I have to mentally remind myself time and time again that while it is second nature to me, being poked and prodded is not a common experience for the patient. A few times I have caught myself talking to the patient, making small talk till I see the look of dread on their face and then I have to snap my mind back to remembering that the patient is not used to what I am doing to them. It does take some amount of thought (at least I need to think about it) to remember what is wrought process for one person is not for another.

It is not an excuse for any person (TSA/Police/Physicians/Nurses/etc.) but maybe more of an explanation.