2 sentences

1. 他来你房间搞什么鬼？

   tā lái nǐ fáng​jiān gǎo shén​me​guǐ?

   What the hell was he doing in your room?

   Source: OpenSubtitles

2. 你究竟在搞什么鬼？

   nǐ jiū​jìng zài gǎo shén​me​guǐ?

   What the hell do you think you're doing?

   Source: OpenSubtitles