21.   Because sound travels so much slower than light, witnesses saw streaks of burning debris before hearing the explosion, causing the misslelike illusion.

22.   Beta, said four explosions were heard.

23.   A couple of seconds later or so, I heard another explosion, and this one was closer and it kind of shook my ship a little bit.

24.   A mother who heard the explosion of the mosque and was convinced the world was coming to an end.

25.   A neighbor heard the explosion and broke open a window to call the boy.

26.   After hearing an explosion, which was later found to be a firecracker, the officers ordered Sayon to halt, and a struggle followed.

27.   After the TWA crash in the Atlantic Ocean off Long Island, some witnesses said they heard one explosion, while others heard two.

28.   All of a sudden I saw a bright flash and heard two explosions, almost simultaneously.

29.   But when I heard the explosion, it brought it all back.

30.   Columns of smoke could be seen from the periphery of the cordoned area, and explosions were heard.