Nishanthan Gnanathas, who was the best man at his friend's wedding, hit his head on a wire balustrade when he was pushed from a yacht into the River Tagus in Lisbon as part of a prank in July this year.
"I accept the cause of death as immersion in water. My final conclusion is that I am entirely satisfied that this was misadventure," said Coroner Fiona Wilcoxat an inquest hearing into his death at Westminster Coroner's Court yesterday.
According to 'The Sun', the 31-year-old was part of a group of 13 friends during the party cruise in July to celebrate Youseff Ismail's wedding the previous year.
"Nish was my best man. He organised the trip to go to Portugal as a stag do. Nish ended up in the water and hit his head on the way in. Everyone was like 'oooh'. I jumped in, so did Andre, but we couldn't find him. I think we were on our first beer," Ismail told the court.
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Andre van Eck, the friend who pushed the victim into the water, told the court, "We had horseplay all the time. We had no intention for anyone to get hurt."
Explaining why Gnanathas was to be thrown overboard first, Van Eck said, "He was the best man. When we went to restaurants and the food was late, it was Nish's fault."
Gnanathas' family had to wait for six days before his body was recovered from the water after a major sea and air search involving police boats and a helicopter.