Did you signal? If you never signal then suddenly overtake I
will also horn, flash and perhaps even show middle finger at
you.
Actually its all about judgment lah. Sometimes Singaporean drivers
tend to always have tunnel vision, which is like only look in front
when driving and not aware about what is happening around him/her.
Only when wanna change lane or overtake then check mirrors. By then
sometimes already too late then all the dangerous stunts will come
out. If possible, I feel a driver must try to plan around 5 cars
ahead of him as far as possible. So that no need to cut lane and
overtake dangerously.
Also, on a sidenote, I always notice drivers, especially females
(not trying to be sexist here), like to arch forward and drive
while sitting on the edge of their seats. Relax leh, not driving F1
car leh. Somemore, I sit back relax drive with 1 hand also go
faster than them. Bad habit you know...