I did this too! It was mortifying. Not only was I crying, I was doing the snort/sob/snot running down your face cry. Thank god it was a red eye and it was probably too dark for anyone to see. Though, I did eventually have to get off the plane. Looking like I just found out my whole family had been murdered.

Do not read Mary Roach's Stiff if you are on a plane and don't like reading about plane crashes and what happens to people's bodies when they die in a plane crash (I made this mistake! Save yourself!)