A woman was taught how to wear a face mask properly by an irate swan in a video that has gone massively viral online. In the video which has swept across social media, a woman can be seen crouching in front of a swan at a park. Her face mask hangs down her chin, exposing her nose and mouth. Apparently offended by this sight, the swan reaches across the small stream separating them and snaps it across her face. Watch top 10 viral news.