I believe that she may have had a very traumatic experience with a pickle when she was very young. This is a textbook example of an extreme phobia. My guess is that when a very little girl someone molested her with a pickle or cucumber. It's very sad.
I have known people with phobias because of traumatic childhood experiences. I myself have had to deal with phobia because of traumatic experiences. Some of the comments on that video were cruel.
And yes, there is a major difference between causing and warranting alarm. Officers need to learn the difference.