.Happened on bus 23 at a bus stop outside Sim Lim Square, 10 Feb 2007, 2.30pm.
There must be some pushing and shoving inside the bus, just before the bus stopped.
Then there was an exchange of vulgarities and hand gestures before the young guy got off the bus.
The old guy then continued taunting the young guy.
The bus driver closed the back door after the young guy got off, but he pressed the emergency button located outside the door to open it.
And what happens next is shown in the video...