I can fall asleep almost anywhere. I routinely fall asleep in the break room at work. Once, I was helping a friend fix his car, and I fell asleep on his garage floor when he went inside to get water.
But in a hot metal tube tearing through the sky, with my neck all kinked? Get out of here, man.
LOL. I cracked up
It is impossible for me to sleep on a plane, I have tried everything. In the end, I just have flight anxiety, and there is nothing I can do.