那匹马听到巨响后惊得连连倒退并把骑手从背上掀了下来。

The horse shied at the loud noise and threw its rider.

youdao

看来听到巨响的不止他一人，因为“推特星球”（twittersphere）很快就充满了这个俄勒冈州城市里各地用户的骂声（毫无疑问）。

It seemed he wasn't the only one, as the twittersphere was soon thick with (no doubt) WTF-style exhortations from around the Oregon city's users.

youdao

我听到四五声巨响。

I heard four or five loud bangs.

《柯林斯英汉双解大词典》