The internet is "going ape" for a pair of gorillas who decided to "monkey around" while posing for a selfie by standing on two feet. "Another day at the office..." Mathieu Shamavu wrote alongside the now-viral image, which shows him standing in the foreground as female gorillas Ndakazi and Ndeze gaze at the camera behind him. Shamavu, an anti-poaching worker at Virunga National Park in the Democratic Republic of Congo, is reportedly one of many park rangers who have become like parents to Ndakazi and Ndeze after their actual parents were killed in 2007. "Those gorilla gals are always acting cheeky so this was the perfect shot of their true personalities," Virunga National Park wrote on Instagram. The park also addressed rumors that the pic was faked by adding, "It's no surprise to see these girls on their two feet either--most primates are comfortable walking upright (bipedalism) for short bursts of time."