The altercation started when the woman accused the boy of stepping on her foot, and the pair began swapping insults. The boy called the woman a racist and compared her to an 'escort' and she said he was a 'smelly Nigerian.'

The argument then descended into violence, when the teenager lunged at the woman before being dragged off by other passengers reports The Daily Mail. 

Watch the clip below to see the outcome - neither party comes across particularly well...