Unbelievable

the act of quickly looking at something or someone twice, usually due to surprise, confusion, or disbelief

When I saw my friend's new, bright pink hair, I did a double take – it was such a dramatic change.

temporarily unable to think of what to say or how to express oneself, often due to shock, surprise, or intense emotion

When I saw the breathtaking sunset over the ocean, I was completely lost for words.

to cause surprise, curiosity, or mild shock among people due to something unconventional, unexpected, or controversial

Her irreverent chatter during the ceremony raised many people's eyebrows.

news or an event that causes a great surprise

The announcement of his resignation came as a bolt from the blue; no one had any inkling that he was planning to leave.

to survive or endure until a particular moment or event occurs, especially one that was uncertain, significant, or eagerly anticipated

I bet you never thought you'd see the day, huh?

to cause a person to become very shocked, amazed, or confused

I was so taken aback when I found out I'd won the lottery that you could have knocked me down with a feather!

used to say one is unable to say anything due to being extremely surprised, angry, or shocked

When he saw the breathtaking sunset over the ocean, words failed him, and he simply gazed in awe.