Is it a bird? Is it a plane? No, it’s just human cannonball Gemma Kirby, the world’s youngest female human cannonball who performs in the Ringling Bros.’ Circus XTREME. She has been shot out of a cannon more than 500 times. To showcase the dangerous and exhilarating world of extreme circus sports, Kirby, 25, strapped on a GoPro as she was catapulted 40 feet high at almost 60 mph. Needless to say, don’t try this one at home — unless your home happens to be the circus.