Cruise ship passengers were seen laughing and drinking their pints as the ship rocked violently in the middle of rough sea.
Marine engineer Calum Lawson, who was working on the cruise ship, even filmed the moment a swimming pool sent torrent of water across the deck.
Children are heard screaming in the background as the water flushed chairs and tables aside.
But the adults seem unfazed and carry on enjoying their meal and drinking their pints - with some even lifting their legs up as the water flow past.
Calum, from Newcastle-upon-Tyne, shared the clip onto his Twitter on Sunday, branding the cruise passengers as 'typical Brits'.
He wrote: "Best part of this video is the amount of typical brits are so un-phased by any danger that occurs because 'they're on their jollies' n nothing can spoil that...b****** ships flooding man."
A man in a burgundy top said: "That's not a handful of water is it?"
Another video shows water from the swimming pool spill and surge onto the deck.
The clip has been viewed over 576,000 times as some web users suggested it was taken on the Ventura or the Norwegian Star.
'Jasewba' said: "It's not flooding. Rough seas and the pool is overlfowing. No need to panic at all."
'JTW' agreed and guessed it could be 'going over big waves and the ship rocking, spilling the pool water out'.
However others found the passengers' reaction quite bizarre.
Love Island star Molly-Mae Hague commented: "People aren't even getting up from their tables. Mad."
Some said it would be their worst nightmare whilst some said the cruise would be 'another one to tick off the list'.
