Exploding manhole cover knocks boy to the ground after he drops lit firecracker into sewer

One of the boy's friends had to be rescued by police after nearly falling into the sewer

The boy was sent flying by the exploding manhole (ITN)

This is why you don’t throw a firecracker down the drain.

A video from China shows the moment a young boy is knocked to the ground after dropping a lit firecracker down a manhole.

It doesn’t quite turn out how he planned though, with the exploding firecracker launching the boy backwards, while his friends take cover.

The blast saw two manhole covers removed with one of the boy’s friends having to be rescued by police after nearly falling down one of the uncovered holes.

Speaking after the event, a spokesman for the city’s security bureau said none of the children were injured.