I use my fountain pens on airplanes, the trick being to keep them full and to be prepared that there may be a little mess when I open them.

Juan Felipe Herrera On Poetry In Tough Times

…He splatters both figuratively and literally. Herrera does much of his writing these days in airports or on airplanes, using leaky oil pens or, when he can, fountain pens. “Fountain pens blow up when you’re 35,000 feet above sea level. So I take them but I really can’t open them.”..

http://interlochenpublicradio.org/post/juan-felipe-herrera-poetry-tough-times