I was recently on a flight from Milan to Rome. It was like 99% Italians, but there was also me (an American), and a nice, quiet Belgian couple in the seats across the aisle from me.
Like 15 minutes after the plane took off, the Belgian lady started barfing into a plastic bag. She was barfing pretty hard, and she wouldn't stop, so a flight attendant came over. The Belgian husband started motioning toward his ear--I think he was trying to say that his wife had an inner ear thing that was causing her to barf.
The flight attendant called over the intercom to see if there was a doctor, and then she went back to the lady.
All the people on the plane started talking, and many of them stood up in the aisles so they could better see the Belgian lady. I pretended to read a magazine, trying to be polite, but the guy next to me started shaking me by the shoulder and pointing at the lady.
People were leaning over their seats and craning their necks. The poor lady, who was clearly embarassed, had like 45 wide-eyed, worried faces within 5 feet of her.
Suddenly there was a cacophony. Somebody was shouting. I was just able to see, through the crowd in the aisle, that a very short, very elderly Italian lady was throwing up her hands and yelling about something. She kept saying the word "limone, limone!!"
A general murmering started happening, and then other people started yelling "limone, limone!"
I deduced that the old Italian lady had decided that the barfing Belgian lady needed a lemon to help her stop barfing.
Somebody toward the front of the plane inexplicably produced a lemon. They lifted it triumphantly up above their head. A loud, very dramatic group effort ensued: people reaching over several rows of seats, shouting and grabbing the lemon from each other, and then theatrically handing it along. Eventually, a quivering hand shoved the lemon into the lady's face.
Unfortunately, it turned out the Belgian lady could find no use for the lemon.
The plane landed in Rome not too long later. The flight attendant allowed the Belgian couple to get off first. As they walked, anxiously, down the aisle, they were met with thunderous applause...