My body is in L.A. but my head is somewhere over the Mediterranean Sea. I landed in L.A. after 31 hours of traveling. I don't really mind long plane trips. I begin to relax when I get in the taxi. That's when I relinquish control.
In our modern society of too-late work hours and too much time in front of computer screens, we are listening to our social clocks more than our physiological clocks, causing a greater sleep gap, known as social jetlag.