Translation of "Stunned" in Japanese

I was absolutely stunned!

私は本当に 驚きました！

Devastation in Haiti, stunned victims of the earthquake.

They were stunned after finding out about his resignation.

彼の辞任を知って、彼らは呆然とした。

“I cannot approve your manner of  march. You go on like a stunned fool  

「私はあなたの行進の仕方を承認することはできません。あなた は私の命令に少なくとも気づいて

- They were stunned after finding out about his resignation.
- They were dumbfounded by the news of his resignation.

彼の辞任を知って、彼らは呆然とした。