A group of mischievous children learned the hard way that fireworks and a sewer full of methane gas most definitely don't mix!
The boys were playing out in the street in China when they decided to throw a firecracker down a manhole, as you do.
But they got more than they bargained for when the firework lit the explosive gases – and sent them flying through the air.The astonishing incident was captured on film and uploaded to YouTube where it's been viewed thousands of times.
It shows the children loitering around a concrete area before one has the bright idea of dropping a firecracker into the manhole.
As it lands in the sewer, it ignites gas, causing an almighty explosion which covers the entire area in a huge plume of smoke.
The blast even blows a hole in the floor, swallowing one of the young boys and surely teaching him and his friends a lesson.
Shocked adults quickly appeared at the scene and dusted the boys down. It appears that none of them was seriously injured in the explosion.