NET
18 All the people were seeing the thundering and the lightning, and heard the sound of the horn, and saw the mountain smoking—and when the people saw it they trembled with fear and kept their distance.
Darby
18 And all the people saw the thunderings, and the flames, and the sound of the trumpet, and the mountain smoking; and when the people saw [it], they trembled, and stood afar off,
KJV
18 And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw [it], they removed, and stood afar off.