I was on a plane flight to Italy and I happened to pack my travel watercolor case and a small pad. I forgot to bring any references, but that turned out to be okay, I just grabbed the Duty Free mag and looked though all the pictures. I zoomed in on one woman's stunningly green eyes for a perfume ad. The ride was a bit bumpy due to turbulence so I decided to do a somewhat loose painting so i wouldn't have to worry about details. It was a rather fun thing to do on a plane, I could hear the stewardesses and people around me whispering "she is painting! on the plane! how does it look?" No pressure, just a bunch of really bored people with nothing better to do other than watching you paint... lol.