One time,...flying with 1time, not for the first, or last time, they had a competition, whoever guessed nearest to the amount of fuel they had on board got the jumpseat. Everyone had to write the amount on their boarding cards which was collected by the hosties. It was my lucky day!
Found the crew most professional an patient with my stupid questions. Also think it safer going for a leak and legstrech now and again than sitting for hours getting floating eyeballs. A chat to the hosties would probably get the heart beating faster and blood circulating...all good for aviation safety. heehee