The astonishing video captures two manhole covers exploding dangerously close to a child playing with a sparkler. https://filedn.eu/lhVNGNsizwl5t7THnzzJ2c8/New%20public/AsiaWire-CrackeManhol-01.mp4 Surveillance camera footage shows the boy spinning around in circles while holding the firework in his hand in the city of Yibin, in China's south-western province of Sichuan, at around 7:30pm on…