Woman chases after man who punched tube passenger

It seems that racism is alive and well not only in South Africa - but in other parts of the world too.

What prompts a person to literally stand up to get off the tube in London, and then punch another passenger in the face in an unprovoked racist attack?

Little does this thug realise though, that by hitting this guy, he's going to be chased down the station platform by a furious woman.

There seems to be absolutely no reason for the attack and it's disgusting in every sense.