Worst travel experience when coming back from holiday?

Getting altitude sickness in the Andes. I was so sick. By the time I got to Cusco, which is still 3400 metres, I had chronic apnea and exhaustion, falling asleep and waking within a minute gasping for air - for 12 hours. The doctor basically told me get the first plane you can out of here or I need to hospitalise you overnight with oxygen. You could die. Oh, ok. Booked the next flight and checked out within ten minutes, had no accommodation booked in Lima, just left without my son and his partner. Had to message my son who was out touring that I was heading to airport. He booked something for me in Lima. Within 30 minutes of being in the air in pressurised cabin I felt normal. And his partner was constantly rude to me for the entire trip and the way home, so I moved my seat forward in the plane home so I wouldn't sit with them. Then the airline had cancelled my connecting flight so arrived half a day later than planned. It was a horrible trip.