From knocks on the bumper to knock-out punches, see the events that lead to people seeing red on the roads. Psychologist Anjula Mutanda explains the stresses of getting from A to B.

Clip show of dramatic confrontations filmed by eye-witnesses, presented by George Lamb. Politically charged tempers can lead to mass violence, and celebrations in the streets can easily go too far. Anjula Mutanda explains why overcrowded streets can create tension and a breach of personal space causes us to crack.