There are many such Sinkies around, they are coward in nature like those 60% who voted PAP, they know they are coward but in order to phyco themselves that they are not, they will pick a fight with people they can makan. Like this case, once he hear Police come, quickly chow, or if a bad ass Tattoo guy hit his arm with the straw, he will bow his head and walk away.
The best way to deal with them is unfortunately call the police, I like to say smash his face but in Sinki land, you will end up in court, fine and maybe jail.
But if he hit your father or family member then all bets are off, the excuse is self defense, green light to go for the kill.
Bro GD, Tio bo?