A flight attendant has revealed the most irritating drinks order a passenger can make at 36,000 feet.
But it's not three different variations of a martini, it is actually just an innocuous Diet Coke.
"As you may know, the aircraft cabin is not pressurised to sea level, but rather to the equivalent of about seven or eight thousand feet," writes "Jet" on her blog. "This means some passengers might feel a little light headed or that alcohol affects them almost twice as much as it would on the ground.
"It also means soft drinks foam up a lot more when poured out of a can. The worst culprit for this is Diet Coke.
"I literally have to sit and wait for the bubbles to fall before I can continue to pouring. If all three passengers ask for Diet Coke I'll often get them started, take another three drink orders, and then finish the Diet Cokes."
You heard it here first. Pouring a Diet Coke at altitude is like serving a Guinness and cabin crew, frankly, don't have the time.
Rather unsurprisingly ordering a Diet Coke is not only request that irritates the cabin crew.
Here's a list of other comments made about the annoying habits of air passengers, listed on a Facebook group.
Taking forever to decide which drink you want
"You've seen me walking down the aisle with the drink cart for 20 minutes already." - Facebook user Corinne Spring
Leaving rubbish in the seatback pocket
"We walk through doing a garbage pickup every 10 minutes!" - Valerie Reiter Kennebeck
Keeping your headphones on while you order a drink
"You are screaming at me." - Kimberly Lupo
Walking around the plane barefoot
"Ewww!" - Amber Nicole
Poking me or tugging my dress
"A simple 'Excuse me' will get my attention." - Abbie Unger
Getting up to use the bathroom right before landing
"You've had HOURS to do so." - Joey DiGregorio
Handing me tissues, toothpicks or used baby diapers
"There is a barf bag into which you can dispose of anything and then place it into the plastic bag as we walk through the cabin." - Lynn E Miller
Commenting on "how small the plane is"
"I fly regional, so of course it's small. This is a 30-minute flight!" - Gina Andrade
Hanging out in the galley
"Do I come to your office to do yoga and hang around?!" - Nia Monet
Going to the bathroom while meals are being served
"Seriously… you're in my way." - Corinne Spring
Whining about a tight connection when the current flight is on time
"Just stop booking such tight connections!" - Diana Hadley
Asking to borrow a pen for customs forms
"I don’t have an unlimited supply in my pocket, and no I won't give you one A) because it's my favourite and B) because I'm required to have it on me at all times." - Lorisa Maxwell