蓦然回首我只是跳梁小丑
[mò rán huí shŏu wŏ zhĭ shì tiào liáng xiăo chŏu]
'I turned back suddenly, only to find myself just a ridiculous joker'. This is based on a traditional Chinese idiom '蓦然回首' (look back suddenly), and it expresses self-deprecation and a sense of humor in acknowledging one's role in certain situations as not being significant or taken too seriously.