İf it is so loud that it wakes one up, it is a warning that should be immediately investigated
See explode / explosion and shot
Vision: Hearing a bang: agitation and dread threaten you, and also nervous stress. Sometimes the dream is eauscd by a natural sound, like a door banging.
Depth Psychology: A bang in a dream is often indicative of sudden unpleasant events that have either occurred already or are imminent.