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A computer-mad commuter arrested for riding an underground train naked claimed he was "living in a video game world".
Shocked passengers spotted the man board the busy train in just a pair of shoes earlier this month.
Footage shows the man on his mobile phone and chatting to other disturbed passengers in Hong Kong.
A witness claimed they overheard the man saying he had no clothes on because he was "living in a video game world", the South China Morning Post reports.