Forget snakes on a plane — this flight came with its own haunted-house fog machine.

One traveler was left spooked recently when her plane cabin filled with fog so dense it looked like a scene ripped from a slasher flick.

TikTokker Giselle (@giselleinmotion) was flying from Bali’s Denpasar Airport to Melbourne, Australia, when the Jetstar flight turned into what she described as “the start of a horror movie.”

Before the plane had even taken off, condensation from the aircraft’s air conditioning system became so intense that others onboard could barely see a few rows ahead.

In a viral clip, bewildered travelers could be seen fiddling with their individual air vents in a failed attempt to clear the eerie haze.

“Something tells me the plane’s air conditioning is working overtime,” Giselle captioned the video.

In the clip’s voiceover, the Aussie passenger acknowledged that condensation can sometimes build up on planes when there’s a major temperature difference between the cabin and the air outside. 

But she said her Jetstar flight was “a little bit insane,” recalling that everyone around her “couldn’t see more than about two, three rows ahead” as the fog lingered throughout their time on the tarmac.

In an interview with Yahoo Lifestyle, Giselle said the haze was already visible when passengers boarded — but it only got worse.

“It was like that from the moment we boarded, but got progressively foggier to the point where we couldn’t see much,” she said.

While the spooky scene rattled some passengers, cabin crew repeatedly reassured everyone that the mist was harmless and linked to the plane’s cooling system.

“To give the crew due credit, they made several announcements to reassure people that it was just the air conditioning system,” she explained.

The bizarre footage quickly sparked panic — and jokes — online.

“Girl I’d be offfff that plane that’s terrifying,” one user wrote in the video’s comments section, while another quipped, “Classic Jetstar. Why do people fly Jetstar?”

Others were less alarmed, with one traveler emphasizing: “Just be thankful the air was on, i’ve been on so many flights where the air-conditioning was not turned on until we taxied.”

“Perfectly normal. Always happens in tropical areas,” another insisted.

One viewer compared the foggy cabin to a rave, joking: “Looks like a nightclub in the early 90s.”

“This happened to me leaving Koi Samui, scared the crap out of me,” one other person shared.

Others said they’d never seen anything quite so extreme.

“I’ve flown many, many times around the country for 30 years, and I’ve never seen it like that before. A bit of fog, but not like pea soup. Very weird its suddenly so common,” one stressed. 

The spellbinding scene, as other commenters pointed out, is a fairly routine side effect of air travel, especially in tropical climates. 

Sharp changes in temperature and humidity can cause moisture in the cabin air to rapidly condense into fog — especially when scorching outdoor heat clashes with a plane’s icy air conditioning while sitting on the tarmac.

Thankfully, the ominous haze usually clears within minutes once the aircraft takes off or the cabin temperature evens out.

And as bizarre as this flight looked, it’s hardly the first time airplane air conditioning has sparked turbulence among passengers.

As previously reported by The Post, one fed-up traveler took to Reddit after repeatedly catching his seatmate shutting off his overhead air vent mid-flight.

“The person sitting in the middle has now 3 times closed my AC vent either while ‘adjusting’ their own vent or when I stood up to go to the bathroom,” the passenger fumed.

“The vent is pointed towards my face, nowhere near their direction.”

Things only escalated when the accused “vent villain” defended himself by insisting, “I paid for my seat, not the communal AC system.”

The frosty feud triggered a full-blown online debate, with fellow travelers weighing in on everything from airplane etiquette to ideal cabin temperatures.

Others offered simpler advice: “People need to bring layers on a plane.”

Between fog-filled cabins, vent wars and seat-swap showdowns, modern air travel is increasingly proving one thing: the real in-flight entertainment is often the passengers.