- Somewhere, off in the distance, a klaxon sounded and everyone around me started running.
- As a police helicopter thundered overhead, many of the demonstrators sounded klaxons and blew horns to make their point.
- Alarm klaxons started to sound throughout the corridors.
- After all the excitement had died down and we were getting on with what we were doing beforehand, the fire klaxon sounded again.
- Warning klaxons went off, flooding the room with flashing red light.