그건 헛된 꿈일 뿐이야 - Avengers: Endgame

Black Widow, Captain America, Ant-Man은 Tony를 찾아가 시간 여행에 대한 이야기를 합니다.

Tony: You accidentally survived. It's a billion to one cosmic fluke. And now you wanna pull a... What do you call it?

Antman: A time heist?

Avengers: Endgame

Tony: Yeah, a time heist. Of course. Why didn't we think of this before? Oh, because it's laughable. Because it's a pipe dream.

pipe dream은 이루어 지기 힘든 몽상, 희망, 계획등을 뜻합니다.

She's got this pipe dream about being a pop star.