It is fun to mess with people on the boat. There is a certain very nice but un-named person who has a habit of staking claims of seats in multiple locations, leaving a coat or a bag to mark his territory upstairs and down, if it isn't crowded. The social butterfly flitting about the various cliques on board...

So someone *cough* *cough* *Adam* *cough* (with some encouragement) "hid" his stuff (on seats opposite where it wasn't obvious as he approached up the aisle).

He walked up, confused for a moment, spun around and laughed.