Heartstopping moment angry silverback gorilla chargers at unsuspecting tourists

A group trekking through Uganda's Bwindi Impenetrable Forest had a frightening - though not completely unexpected - encounter with a silverback gorilla, as the powerful animal came barreling down a hill, roaring and baring his teeth. Wildlife conservationist Callum Perry captured this footage while on what he called a 'once-in-a-lifetime trip' trekking through the forest, which is known for its gorilla population. He told Storyful he and his group were working to track a different gorilla family when they encountered the charging male.