That looks like one of the bonus dealywhops from the "Supersize Me" DVD. I saw the that movie when it came out and haven't eaten McFastfood of any kind from any source since then. I east fast food, but only the real sandwiches from the mom and pop shops where it's all home made.
Them fries were so scary it changed my eating patterns for life
1. Rotting in a jar has nothing to do with digestion in the stomach.
2. The non-McDonald's fries probably have no preservatives and were made more-or-less fresh (perhaps frozen for a short time).
3. He never touched the fries. That's how the bacteria that creates the molds gets on the food. I'm also willing to bet that the bag that the non-McDonald's fries were in was opened by someone's hand. Whereas the McDonald's fries container was open with the metal fry-scoop (again, no bacteria transfer).
4. I'm not going to eat again today.