LOS ANGELES - “America has a pandemic problem so I solved it by making a gun,” tweeted Pan, along with a video about the mask gun.4RELATED: Doctor demonstrates how face mask blocks respiratory droplets from spreadingPan, an “engineer, educator, YouTuber, hitchhiker and overall imagination man,” according to the website for the popular Television show “MythBusters: The Search,” on which he was a contestant, set out to develop a “mask gun.”Pan’s video highlights altercations between individuals refusing to wear a facial coverings and others.