 The video depicts the incident that took place on the upper deck of a double decker Kowloon Motor Bus , Route no . 68X en route to Yuen Long , Hong Kong at approximately 11 : 00 pm on 27 April 2006 . 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 . The older man turned around and started a monologue , ranting about being unnecessarily provoked under stress . The younger man , who seldom talked back , expressed a desire to end the discussion . However , the middle @-@ aged man insisted that the matter was not settled and requested an apology from him . The younger man apologised , reluctantly shook hands , but also warned the older man regarding the use of mother insults . This last warning resulted in more profanities from the older man . The video ends with the older man receiving a phone call . 
