"#NUSOddities - A PRC student wearing his VERY DIRTY LAB COAT stained with a multitude of dyes. GPGT."
This is, of course, inaccurate.
1) He's not a PRC
2) He's not an NUS student [anymore] (this bit was implied)
3) His lab coat is not dirty - it's stained on purpose (who could possibly get this sort of stain accidentally?!)