Food Safety Report: Impossible Whopper, Burger King, Harry Walker Parkway South, Newmarket, ON, Canada 1 year ago • details 7 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain Suspected source: Burger King impossible whopper, milk shake, fries Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me