Ok, you have my curiosity. Is there some cat taunting act with cucumbers that I am not aware of? I am not a cat person myself, but I have worn out many batteries making my friends cats turn circles until they collapse from dizziness by chasing the trusty laser pen.
Set a cucumber on the floor behind a cat while it’s eating. Make sure cat doesn’t see you set it down.
Now wait until cat is done eating. They Freak out