To her horror she saw him fall.

她看见他跌下而惊恐万状。

youdao

I saw him fall to the ground.

我看见他摔倒在地上。

youdao

I saw him fall down from the tree.

我看到他从树上摔下来了。

youdao

People in the area saw him fall down.

VOA: special.2009.12.14

When he was about 20 yards away I heard a bang and saw him fall to the ground.

BBC: Inquiry hears IRA guns were removed

Deck hand Mr Robertson was lost overboard between around 00:45 and 01:45 but nobody saw him fall in the water.

BBC: Criticism of fishing boat St Amant after death off Anglesey

"I saw him fall, grabbing his leg, " said Travis Craig, 28, who was at the celebration, saw the shooting and said he used a belt to apply a tourniquet to the man's leg.

NPR: Gunfire Erupts At Colo. Pot Event, 2 Wounded