I am a member of the mile high club.....sketching, that is. Is there another? One row up across the aisle is the perfect position for acquiring an unknowing model. This gentleman was a fidgeter....tall and lanky. He spent lots of time standing in the aisle where his legs could expand. During the sitting intervals, he provided me with ample drawing opportunity. The difficulty was in his slight lateral movements to the left and right, where the degree of eyeglasses and nose changed from time to time. Therein lies the challenge. Values were all midtones, so there were no extremes on which to build a stronger sense of patterning. No strong light. I was satisfied.