My last flight from Kuala Lumpur to Adelaide, I was at the very back the plane. There a couple of curious things going on.
First up, they didn't switch the air con for ages. There must have been some ambient heat in the plane from the climate at the airport, and when 300 passengers boarded, it didn't help matters. About every fourth person on the plane was fanning themselves with one of the info cards in the seat pouch for about all the way through taxiiing and take off, but the staff didn't seem to notice, and didn't put on the air con until long after I (and, no doubt, a few other people) complained.
But the more disturbing thing was the constant high pitched squealing noise coming from the door at the back left. It was like tinnitus, only much louder. It sounded like the death complaints of an electric motor that's been cranked far too high.
I asked a flight attendant what it was, and her only reply was: "Would you like to be moved to a new seat?"
Given this didn't answer my question, I asked it again, and was given same non-answer.
This time I said yes. I figured if the plane was going to crash because of an explosive decompression, as a result of a door failing, I may as well die in comfort. I was also worried that the high pitched shriek might actually damage my hearing, if I was subjected to it for too long.
The good news is that there was no explosive decompression, the plane didn't crash, I'm still alive and my hearing is still good. And, when I changed seats, not only did I get away from the noise, but I got an entire middle row to myself. I was actually able to lie down on my side and get some sleep on the overnight flight, which was unheard of.
Still very puzzled about what that noise from the door was though.