I've never had one but I do know what it's like to have have to deal with a lot of pressure.
I came in to work one night, during a lady having an reaction to a blood transfusion from earlier in the day.
I had to find out if her reaction was hemolytic or just febrile, I was by myself never done a reaction workup before, couldn't get in contact with my supervisor, and was on a short time schedule, so pretty much my actions and results at time determined the doctor and nurses plan of action going forth and mistake on my part could lead to a person's death and our hospital and and the parent hospital being sued.
Long story short, I read up what to do in the the procedure manual, go for the patient and the patient is trying to leave the hospital in the middle of the reaction
Me and the nurses have to convince the patient to stay and get bloodwork drawn so we can see what's up. All the while department heads, pathologists and my supervisor finally start calling with the

...

...who

Tone.
Luckily the patient just had a mild febrile reaction, be my findings lead directly to someone getting fired at the parent hospital.
Please respect healthcare professionals, because the stress levels go from 0 to 100 real quick and we have to try our best to not break down and its day in day out.