Things you find in your food (Part 2)

OK. So I have told you about the maggots in my dinner. Dave commented on that that he found a huge cocoon of a bug-like creature in his salade once. I just saw a news item on a dutch news site that reported of a similar thing.
Vrouw treft levende kikker aan in salade
It's in dutch so I'll translate the news item here:

Woman finds living frog in her salad
The hague - A woman from Langeveen (the Netherlands) had the scare of her lifetime last thursday evening. While eating a Burger King-salad she came across a stil living frog.

The woman had already eaten half her salad when she found the black creature. The woman made a scene, upon which the storemanager came rushing. He immediately removed the salad with the frog. Employees of Burger King offered the woman a new meal, but her appetite was already gone.

In a reaction to NU.nl (this dutch website) Burger King responds that they have not figured out yet how the incident could have taken place. The fastfood restaurant gets all their salads delivered premade and sealed.