1.   Warning, this is a government health warning, there is going to be a large bang.

2.   The officer, who did not want to be identified, said the alleged bomb makers focused more on creating a large bang rather than a dangerous explosion.

3.   Witnesses on the ground said there was a large bang, and they saw blue and orange flames shooting out of the tail engine.

4.   Eyewitnesses reported hearing a large bang and coming out into the street to see a large smoke cloud rising over the back of the city hall.