あっとwith a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment

空(そら)を飛(と)ぶ人(ひと)を見(み)てあっと驚(おどろ)く。

I see a person flying in the sky and I am astonished with a cry of 'ah!'. {with a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment}

世間(せけん)をあっと言(い)わせる凄(すご)いことをしたい。

I want to do something amazing that would make the world gasp in astonishment. {with a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment}

彼女(かのじょ)をあっと驚(おどろ)かせるようなプロポーズをするぞ！

I'm going to propose to her in a way that will make her exclaim in surprise! {with a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment}

社長(しゃちょう)をあっと言(い)わせることができれば、昇給(しょうきゅう)間違(まちが)いなしだろう。

If you can make the company president say 'ah!' in surprise, a raise would be undoubtedly on the cards. {with a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment}

世間(せけん)をあっと言(い)わせるような、何(なに)か大(おお)きなことをしたいと思(おも)っている。

I'm thinking of doing something big that would make the world react in surprise or astonishment. {with a (cry of) 'ah!', with a shout (of surprise, shock, etc.), in surprise, in astonishment}