Bananas

Found this little gem:

As part of the admission procedure in the hospital where I work, I ask
the patients if they are allergic to anything. If they are, I print it
on an allergy band placed on the patient's wrists. Once when I asked an
elderly woman if she had any allergies, she said she couldn't eat
bananas. Imagine my surprise when several hours later a very irate son
came out to the nurses' station demanding, "Who's responsible for
labeling my mother 'bananas'?"