...my uncle father cousin all gone to NS 1 know this story.
they say at pulau tekong. at night when its time to sleep. then u
cannot get to sleep. a ah ma and a xiao didi with a ball will come
and see whos not asleep. then if they find out who never sleep. the
xiaodidi will tell the ah ma. that this guy haven sleep in hokkien.
then the xiaodidi will come to u then something will
happen...
The Sgt came up with this story to make sure you sleep??!!