my friend always gets a window seat and if someone is sitting in the middle he will always bang his head against the window and scream out weird things - like "Sega" remember the commercial. If that doesn't work, he'll take out some a mirror, a drug like ambien, and snort. After snorting, he'll turn to the middle seat passenger and say "Damn - that hit the spot - wanna try". All else fails he'll continually scratch his nether regions and offer the passenger an odd array of items - "Hey dude it looks like you might need this puke bag more than me".

My friend is plain weird! And gets a kick out of freaking people out.

He's had tremendous success in opening that middle seat.