A 33-year-old passenger on board an IndiGo flight allegedly tampered with the emergency exit door lever cover shortly after takeoff from Delhi, causing a mid-air scare, police said on Tuesday. Nepal Helicopter Crash: Indian National Killed As 2 Choppers Collide At Pheriche Helipad - WatchAn alarm went off after the passenger touched the cover, triggering panic onboard, he said, adding that any attempt to interfere with the emergency exit mechanism could endanger.