Newcastle - Brussels 1h10min

This Friday I flew to Brussels from Newcastle. The flight is awfully short and take-off and landing take most of the time of the trip, so I decided to use the time by drawing an experiential or atmospheric drawing of it. I think this is the first 'art' post in my blog on 2012... I am hoping to do painting during Easter, hence I started by this inspiring small sketch. No-one will set me a theme, hence I need to come up with one myself... I already bought a 40x40 canvas and acrylic paints. I just need a theme. What could it be? I would appreciate if some-one had any advice or a comment on how to find an artistic theme. I know I could google, but I want something really original! Thanks!