There was a flash and a mighty bang.

一道闪光伴随着一声轰然巨响。

《柯林斯英汉双解大词典》

All of a sudden there was a terrific bang and a flash of smoke.

忽然发出一声巨响，还冒出一股烟。

《柯林斯英汉双解大词典》

There was a bang and a flash of red light: Harry knew that the Snatcher had been Stunned.

砰的一声，伴随着一道红光，哈利知道那个搜捕队员被拖了昏迷咒。

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Afterwards, police fired tear gas and "flash bang" grenades near the main plaza, where Occupy Wall Street protesters have been camping.

BBC: US Occupy protesters clash with police at Oakland port

Yousif said police descended on the mourners and fired tear gas, flash-bang grenades and birdshot.

CNN: Fresh clashes in Bahrain as protester is buried

There is a sudden, blinding flash and a loud bang with the sound of breaking glass, at which point the recording stops.

BBC: UN envoy calls for transitional government in Syria