火星很危险你快滚回地球吧
[huŏ xīng hĕn wēi xiăn nĭ kuài gŭn huí dì qiú ba]
Literally means 'Mars is dangerous, go back to Earth'. This humorously indicates a person is acting odd or difficult ('on Mars') rather than behaving in socially acceptable ways ('being back on Earth'). It reflects some degree of alienation felt towards others who think or act unusually.