I'm thinking in most food mfg facilities, they have to use gloves. Possibly, stupid joke from disgruntled employee

Be pretty easy to roll up a thumb and huck it in the fixens. I actually know someone that found that exact thing in her and her husbands salad. They had just opened a fresh jar of dressing, found it in the first bite."YUCK"

Turned out to be a glove/ finger, but they went through a ton of stress and puking. Syrup of Epatat, Drs. calls, Stomach pumping. Long story short, they had grounds to sue but after finding out what it was and they were safe, did not persue. Only had the company pay med bills.