The Facts on Instagram: "The Guinness World Record for the widest mouth (unstretched) is held by Francisco Domingo Joaquim, also known as “Chiquinho,” whose mouth measures an incredible 17 cm (6.69 inches) across. Verified in 2010, this record still stands unbroken. Chiquinho’s extraordinary ability to open his mouth so wide is attributed to a rare connective tissue disorder that gives him unusually flexible facial tissues."