Lucy Addison wrote: "We need to pack up the rubber dinghies and long straws and find this place."
Zoe Hall commented: "I'd be stood underneath with my mouth open and a bucket to catch it and take it home."
Emily Sutton said: "This may explain why I heart Prosecco has gone up in price?! They lost half the stock?"
And George Tomkins replied: "My heart is broken... why wasn't I there to help save the day?"
It is unclear whether the tank had been overfilled by staff or whether the lid of the tank developed a fault.
Fortunately for the wine-producing region, wineries in Veneto have experienced one of the best harvests on record.
Almost 600 million bottles are expected to be produced this year.
Despite Prosecco being a favourite in Britain, exports have fallen for the first time in a decade.
Exports of the Italian sparkling wine dropped by seven per cent in the first half of this year as drinkers increasingly opt for English fizz instead.