I got friends who did as what you describe in other scenario but
one gonna beaten & send to Hospital for emergency operation
while the other got arrested by Police & charge in Court for
either Assualt, Rioting, Threating(can't remember the name of his
chagre)
Just to play safe, do try to act "Hero" in S'pore cos who knows if
the person that you are confronting with may carry a weapon or is a
Terrorist & you ended up being killed while trying to be
"Hero".