'Lightnings' in the Bible

So it happened on the third day, when it was morning, that there were thunder and flashes of lightning, and a thick cloud was on the mountain, and a very loud blast was sounded on a ram’s horn, so that all the people who were in the camp trembled.

Now all the people witnessed the thunder and the flashes of lightning and the sound of the trumpet and the smoking mountain; and as they looked, the people were afraid, and they trembled [and moved backward] and stood at a [safe] distance.