A 16-year-old named Phillip Angus from Boyertown, Pennsylvania just set the Guinness World Record for the BIGGEST OPEN MOUTH.
His mouth is 3.75 inches from top to bottom when he opens it all the way. He beat the previous record by a quarter of an inch.
And he's happy to have the record, quote, "I never have been the best at anything, really, but I'm now the best at this, and it feels great knowing that I have this and no one else can have it until they beat me."