I was on a flight last week and always end up in aisle seats due to my preference through my travel agency at work. Well, apparently this time I actually had the window and didn't realize it until the other passenger showed up as looked straight at the window and said (loudly), "YOU'RE IN MY SEAT."

I proceeded to move and he tried to start up a conversation to which I put on my headphones and told him "No thanks" basically. He proceeded to drink 6 screwdrivers on a 4 hour flight, some of which were doubles.