这是怎么搞的？用英语怎么说？

How come? 怎么会这样？
how could this happen?
how could this be?
What's the hell？ 这几句都有“这是怎么搞的，怎么会这样的意思？”
延伸：
你是怎么搞的--What's the hell are you doing?
有责备的语气。说明对方的行为有些反常。

What happened here?
What went wrong here?
What went down here?
What's the matter/problem here?

what the hell?(这句不错啊，适用于N种情景）
what's going on here?