A flight attendant has revealed precisely why they dread the moment a passenger innocently requests a Diet Coke, making it one of the most tiresome drinks to serve at 30,000 feet.

While you may think nothing of ordering a refreshing Diet Coke on a lengthy flight, the cabin crew member pouring it could well be quietly seething.

This particular bugbear was highlighted in a candid blog post penned by an anonymous flight attendant known only as 'Jet'.

They outlined the scientific explanation behind why Diet Coke proves rather troublesome to pour at high altitudes.

Once airborne, fizzy drinks served aboard aircraft foam up considerably more than they ordinarily would.

This is due to the ease with which CO2 is released under lower air pressure. Diet Coke, it turns out, produces the most froth of all.

In their illuminating blog post, Jet, who writes under the name These Gold Wings, shared: "Soft drinks foam up a lot more when poured out of a can, and the worst culprit for this is Diet Coke - I literally have to sit and wait for the bubbles to fall before I can continue pouring.

"If all three passengers ask for Diet Coke I'll often get them started, take another three drink orders, serve those, and then finish the Diet Cokes."

Thankfully, there is a solution to this fizzy predicament, as Jet demonstrated in a helpful video showing viewers how to pour the drink in a "smart way".

Since the video was uploaded it has attracted more than half a million views.

They added: "What you can't see is that the Diet Coke doesn't come out of the can when flipped upside down until you lift it up and tilt it slightly.

"This is because the air pressure is keeping the Coke in the can. It makes pouring the Diet Coke very controllable and reduces the chances of spilling or overflow."

While this trick may appear entirely "minor" to some, in a demanding role like Jet's, reliable time-saving techniques such as these can make a world of difference.

Jet explained: "Pouring Diet Coke is one of the biggest slowdowns in the bar service and on the shorter flights those precious seconds count!"

As well as being irritating to flight attendants, fizzy drinks aren't the best idea when you're a passenger either. That's because they're carbonated.

At cruising altitude the lower cabin pressure means gas expands, so fizzy drinks can make you feel more bloated and uncomfortable. They may also aggravate indigestion, especially when you're sitting for long periods.

Water is the better option for keeping you hydrated - and it'll keep pesky headaches and dryness away too.