Packing for my trip to Tennessee, I had a brilliant idea: bring an empty fountain pen, and a bottle of ink.  The pressure change on an airplane makes filled fountain pens spurt ink, ruining pants and pockets and suitcases.  Packing pen and ink separately (I thought) would shortcut this problem.

Unpacking after the flight, I discover that the pen made it through fine, but the (sealed) bottle of ink vented ink all over the (sealed) ziplock bag I packed it in.  My clothes are safe, but that’s another theory sent back to the drawing board.