On the flight over, I was sure that I heard the plane singing to me. It was strange, but I’ve had things sing to me before. There is a piece of highway between Ottawa and Montreal that used to sing to me for a few kilometers.
I was tired. When the mind is really tired, strange things start to happen. Hallucinations, visual and auditory are possible. This has happened to me before. I did an experiment during which I stayed awake for 56 hours straight. I had hallucinations then as well.