There was an Applebees in my area where a customer found a lizard head in their salad. No lie- I saw the photo in the paper. Applebees admitted to it and switched over to bagged lettuce for their salads. I still won't go to Applebees.
The first time I ever tried an Applebee's, my spoon hit something hard in the ice cream scoop in my dessert. I unearthed it, and it was about the size and shape of a small finger...
However, it turned out to be an uncooked breaded cheese stick that had apparently slipped out of one of the bags in the freezer and fallen into the ice cream bin.
The manager and waitress were absolutely appalled and apologized repeatedly, but my wife and I just thought it was really funny.
I once found some curly pieces of steel wire in my food at Applebees. At first they seemed suspicious that I might be trying to scam them, but soon the manager came over and admitted to me that they had been cleaning the grill with a wire brush and pieces of it ended up in my food. He gave me my meal for free. I went back although now I haven't eaten there in years. If I had swallowed the wire it could have been very dangerous.