68X[2] en route to Yuen Long, Hong Kong at approximately 11:00 pm on 27 April 2006.[5] It began when a young bespectacled male passenger tapped the shoulder of a middle-aged man in front of him who was chatting on his mobile phone, asking the man to lower his voice. The older man later claimed that when he was tapped on the shoulder, he was under stress from an argument with his girlfriend and was calling the Samaritans. However, the younger man said that he was in fact merely chatting with friends.[6] The older man turned around[5] and started a monologue, ranting about being unnecessarily provoked under stress.[2] The younger man, who seldom talked back, expressed a desire to end the discussion.