We're pretty sure this wasn't on the menu! Yesterday while eating a Sausage McMuffin at a McDonald's in Singapore, a customer discovered the tail of a baby lizard in her sandwich.

After discovering the slimy creature, the customer took a picture of her half eaten sandwich and posted on McDonald's Facebook page with the caption, "“How gross is tat! (sic)? How r u going to answer for tis! (sic)??”

The fast food chain quickly responded to Sandy's post saying, "Dear Sandy, we sincerely apologize for your experience. We would like to assure you that food quality and safety is of utmost importance to us and we will be investigating this matter.”

People have shared the picture of the newly nicknamed, "McLizard" sandwich over 100 times, and remember, the next time your order at McDonald's tell them to hold the reptile.