He was driving like a maniac.

他发了疯似地开车。

《牛津词典》

He drove wildly, crashing through the gears like a maniac.

他开车很野，发疯似的啪啦啪啦地换挡。

《牛津词典》

He realises, you sense, that he's the sock puppet of a maniac.

正如你认识到的，他意识到自己是这个疯子的傀儡。

youdao

However, he recalled him driving his car "like a maniac" and he was "a risk taker".

BBC: April Jones in the leisure centre

Angel ran around like a maniac as soon as I arrived, probably because his mother visibly stiffened at my presence.

NEWYORKER: Swimming

The length of Bird's posts are unusual, even by blogging standards, causing even her biggest fans to brand her a maniac.

FORBES: Media