no so much what i saw but what i smelled. there was a group of 3 schoolteachers (i know this because they were loud, obnoxious and complaining about having to teach the next day) returning from a spring break trip. they had apparently been drinking and one guy directly in front of me kept farting through most of the flight. complaints to the flight attendant didn't do much. there was only so much she could do while in flight. it was the last flight of the evening from ATL-LGA and we had a planeload of new yorkers coming back from spring break.
if you're a parent, you'll understand this one. saw a lady changing her infant's poopy diaper. wouldn't have been so bad, except it was one of the huge poops that came up the kid's back so it got on/through his onesie. it was a real mess. poor lady.
clipping nails. that's just not something you do on a plane.
taking off the shoes i can kinda understand. taking off the socks as well... ew...