I remember a few years ago when I was still working as a LAME I asked one of our customers if I could do a night freight run with him to Melbourne and back in a twin Caravan, for no other reason than I thought it might be interesting to see how the other half lived, the excuse was I wanted to check the operation of the autopilot. Anyway on the way back at about 3 in the morning I glanced across at the driver and noted eyes closed and head on chest, I wondered at the time whether he was just more relaxed because he knew I was there or whether this was a regular occurrence.