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.…