I liked to walk around the cabin and just observing the atmosphere on a long haul flight. Normally after the meals when everyone settles down to sleep.
Once when I was on a trans-pacific flight (JAL NRT-HNL), it was after dinner and the cabin was dark, but the movie playing on the main screen (Spaceballs, that was how long ago it was...) illuminated the cabin enough for me to see the pax in the vicinity.
Suddenly we hit very bad turbulence and the whole plane shook till I thought I heard the fuselage strain. Meanwhile, this Caucasian guy was asleep across the aisle with his head down. Up and down and from side to side, the plane was buffet by the forces forces of nature that there were a few screams in the cabin. But this guy continued to sleep blissfully. Suddenly, there was a strong jolt that caused the 747 to roll to the side... and his toupee fell off his head and landed on his crotch!
His neighbour, my mother next to me, and me of course, saw this but none of us dared to wake him. The "PING" sounded in the cabin and the seatbelt sign was illuminated. The FAs then marched down the aisle to ensure all seatbelts were fastened. He was shaken awake by a FA and told to fasten his belt.
Still dreamy from his slumber, he reached around him and fumbled for the 2 halves of his belt. Looking down, he realised that his crowning glory was no more at the rightful place but staring at him instead. He must regretted what he did till this day because no sooner, he quickly unzipped his pants and forcefully pushed his toupee inside! MAN!
When we rode out of the rough weather and the seatbelt signs were turned off, he left for the toilet and 5 mins later... voila! He had his pride and joy back up there and continued his journey to slumberland...
Welcome to my starry one world alliance, a team in the sky!