Is it because Singapore life is too stressed or what?

then why are there a bunch of girls who laugh like hyennas playing at the playground downstairs at this time, and not seeming tired at all.

it seems that they have been there for hours le. Screaming at top-pitched voices from rocking the see-saw too hard, chasing each other and talking as if they are at some wet market.

if they are too stressed, i forgive them. if they are not, then please grow up lah.
let me give them a piece of advice: if u want to go crazy at night (i may do so with a couple of wild friends), and want to do it at public areas, please go to the beach, or playground by the seaside and you all can play and scream all you want. At least u risk only being caught by some security officers which are rarely on duty, otherwise, ppl around might throw water or eggs down at you.