In 2015, I had a severe allergic reaction mid-flight, causing ceaseless coughing. I received relief only with ice. Woke up next day with swollen body - mystery allergy as I didn't have any before or since. Months later, got bed bug bites on an airplane. Also, Honolulu airport had a shutdown for bed bugs.
Witnessed a man descend into a drug-induced psychosis on a 5-hour flight from Sydney to Perth. Became agitated, pacing the aisle, sweating heavily, and smashing the bathroom door. Threw shoes at passengers, yelling at flight attendants. Upon landing, kissed a spoon only to be handcuffed by waiting police.
"During landing, the plane unexpectedly ascended and circled at high altitude. We were informed of a wing malfunction affecting landing speed. The shaky, intense landing was nerve-wracking, but thankfully the pilot managed to control the plane."