Korean Air has announced that it will no longer be serving Shin Ramyun instant noodles to economy-class passengers. From August 15, the popular inflight snack will be taken off the cattle-class menu due to the increased risk of turbulence, which they claim could make burn injuries more likely. However, business and first-class passengers will still be offered the noodles.

Is this a case of classism? Before you grab your pitchfork and start hunting rich folk, there is a valid reason. Anyone who has flown economy will know how cramped things get back there, with those narrow aisles and people squished in like sardines. Combine this with some unexpected turbulence and a steaming hot pot filled with boiling water, and you’ve got yourself a fairly unpleasant situation. With instances of mid-flight turbulence on the rise, this is probably a smart move on behalf of the airline. At least for their legal department, anyway.

Why is there more turbulence now?

It all comes down to climate change. Basically, turbulence is caused by different wind patterns colliding. While there are some things that pilots can see ahead of them that will give them warning of turbulence to come – such as a mountain range or a thunderstorm – there is also something called ‘clear-air turbulence’, which can’t be seen and can occur without warning. And a recent study from the University of Reading in the UK found that clear-air turbulence has increased around the world as the climate has changed. “Warmer air from CO2 emissions is increasing windshear in the jet streams, strengthening clear-air turbulence in the North Atlantic and globally,” the study authors say.

Best buckle up and try not to think about it too much.

Related story: Danish food authorities have recalled a Korean ramen range for being too spicy