そんな話は聞いたことがない。
I've never heard such a story.
どうしてそんなことをしたの？
Why did you do something like that?
no way!; never!; you're kidding!
Colloquial interjection expressing strong denial, disbelief, or refusal. Often used in casual conversation.
「明日までに100ページ読んでね。」「そんな！」
"Read 100 pages by tomorrow." "No way!"
I've never heard of such a thing before.
You don't have to worry that much, it'll be fine.
I didn't think she was that kind of person.
そんな is a demonstrative pointing to a specific kind already known, while どんな is the question form asking 'what kind of'.