A few years ago the cruelest thing I heard a nurse say to a patient was:
PATIENT: "If I were thirty years younger I would ask you out on a date"
NURSE: "You are half a man, I would have to say no"
(The patient was an amputee) That is just mean. He laughed but I know it must have really hurt him. I couldn't think of anything to say to make this situation better.
How about you, what is the cruelest thing you have heard?