A manhole exploded after a boy put lit fireworks over the seal, igniting trapped methane from the sewer in a city in northern China.<br /><br />The dramatic video, filmed in Chifeng City in Inner Mongolia on January 30, shows a boy trying to put some lit fireworks through the manhole cover and it violently exploding.<br /> <br />White smoke can be seen bursting out of the manhole while the cover and the bricks around it are sent flying, leaving a smoking hole in the ground.<br /><br />The scared boy, seemingly unhurt, runs away immediately and shouts: "Mum, I am so scared."<br /><br />According to the police, the methane from the sewer met the flames on the firework causing the explosion.<br /><br />Three vehicles were damaged, but no one was injured.
