As a lab technician, I generally take fluid (or solid...eeew) and go back to the lab to do my work. So other than that, my time with patients is limited. I think the funniest encounter that I have had was with an older patient. She was being evaluated for a possible cardiac infarction, so we were taking blood samples to verify. Her husband promptly asked the doctor how it was possible for his wife to have a heart attack when she had no heart (jokingly, of course). He wanted verification via an x-ray. His wife, our patient, responded rather wittily, "Dear, I have a heart. I am not denying that it is a cold heart, for antifreeze courses through my veins, but I have a heart". We got a kick out of that.
No antifreeze was found in her bloodwork.