India, Nov. 13 -- A Reddit post has sparked debate over behaviour and etiquette in public transport after a Delhi Metro passenger claimed he was slapped by an elderly co-traveller following a minor accident.

(Also read: Delhi Metro commuter lists 6 daily struggles in women's coach, urges basic civic sense)

In his detailed account, the commuter wrote that he was standing inside a crowded metro coach while charging his phone. "I was standing in the metro, charging my phone. Because of the metro's turbulence, my charger slipped and fell on a senior citizen sitting below. I immediately said sorry, but he got really angry and lightly slapped me while cussing," he said.

The man added that he lost his cool after being hit. "I lost my temper a...